Questions tagged [genetics]

Genetics is the branch of biology that deals with the transmission and variation of inherited characteristics.

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1answer
60 views

Cell division - meiosis

Really confused. How many chromosomes pairs do humans have in their sex cells? How many single chromosomes do humans have in their sex cells?
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2answers
527 views

If dog's DNA and human's DNA are almost same then can it be said that dogs evolved from humans? [closed]

https://www.youtube.com/watch?v=IbY122CSC5w In this video it is said our DNA matches almost the dog's then it can be also said that dogs evolved from humans. Is it?
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198 views

Meaning of phrase with term, “intelligent design” [closed]

I am am mathematician, kindly correct me, If I am wrong somewhere. I am reading a book titled "Sapiens " by Noah Harari. He says Organism are increasingly shaped by intelligent design rather than ...
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2answers
160 views

Is it genetically possible for these to be the parents?

In a human, assuming no mutations, is it possible to have a child with this phenotype, given the phenotype of the parents? The mother, Alice, has black hair and brown eyes. The father, Bob, has red ...
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2answers
414 views

What is Phytogenetics?

What is Phytogenetics? I have searched google without finding a definition. Is it even a defined term? I found it in a reference relating to genetic engineering.
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1answer
70 views

Is it theoretically possible to safely eliminate most viruses in the atmosphere, hence preemptively cure all the viral diseases? [closed]

Could we create a genetically modified virus or bacteria (with inability to mutate into something dangerous for animals) that would quickly spread all over the planet and selectively kill most of the ...
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1answer
462 views

Plant-human hybrid? [closed]

I was bored on YouTube so I searched "plant-human hybrid" and this video came up https://www.youtube.com/watch?v=MiZ35pkxG-k. and I want to know if this is actually possible, I checked the comments ...
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1answer
113 views

The organisms of the same species with a different number of chromosomes [closed]

I am looking for some specific creatures. The organisms of the same species that have different chromosome numbers. Just like male grasshopper (23 chromosomes) and female grasshopper (24 chromosomes). ...
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1answer
117 views

Genetic entropy [closed]

One day my internet acquaintance told me, that genetic entropy can be evidence in favor of intelligent design and he also provides me this waiting time problem and this simulating evolution by gene ...
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2answers
6k views

Why does a gene have two alleles? [closed]

Why does a gene have two alleles? When there is a gene for producing the color pigment for a flower, why are there there two alleles, producing either same color or different color (homozygous and ...
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1answer
784 views

Pedigree problem and type of inheritance [closed]

Please observe the following pedigree and come up with a conclusion as to which type of inheritance is most likely Now it should be obvious that it's either autosomal dominant or autosomal recessive. ...
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1answer
889 views

Punnett square and hybrid cross [closed]

A plant breeder crossed two plants, one with red flowers, and the other with white flowers. Red is dominant. Calculate the phenotype and genotype ratios of the F2 generation of this cross. Is this a ...
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50 views

Can Huntington's Disease be homozygous dominant?

Can Huntington's Disease be homozygous dominant? I am not sure whether the individual who is homozygous dominant for Huntington's Disease will survive into adulthood, or die when they are infants or ...
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1answer
59 views

Estimate for number of genes changed in speciation between a megafauna parent and child species [closed]

At least in terms of a back-of-the-envelope calculation, what is a believable range for the number of gene changes between parent and child species to represent speciation between species of megafauna?...
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82 views

When is it reasonable to assume selection for an observed change?

In speciation events, a lot of changes seems to appear simultaneously. How can a specific partial changes, occuring together with a lot of other changes, be said to be advantageous or disadvantageous? ...
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1answer
65 views

Are modern gene-editing techniques capable of creating genetically-superior versions of humans? [closed]

Can we alter the DNA in, say, a small-framed, low muscle mass male to those of elite bodybuilders? Can we alter the DNA sequence that stops balding and hair loss? How about the genes responsible for ...
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3answers
99 views

You need DNA to make RNA, and RNA to make DNA, so they had to come into existence at the same time?

A statement I recently read: 'Evolution is debunked and gives no basis for morality. Natural Selection throws away info, it does not add. You need DNA to make RNA, and RNA to make DNA, so they had to ...
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2answers
137 views

I'm not sure, are there 46 or 92 DNA strands in each somatic cell. Whatever, how many, then these strands join together to make a 6 or 7 ft long DNA?

When a cell is not divided it has DNA in chromatin form. Usually it is written in books that DNA is 6 ft long. In each cell there are 46 chromosomes, so there are 46 or 92 DNA strands. When a cell is ...
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2answers
104 views

For long term survival of a species in a harsh environment which is more important-mutation or evolution?

The environment is the ultimate cause of population stabilization. Considering the environment to turn harsh for the survival of a species.How to adapt better to this change-by evolution or by ...
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1answer
127 views

Why are worker ants not clones of the queen?

Currently worker ants of most species share only three quarters of their genetic code. It seems like worker ant clones would be better, as it would remove all genetic conflict of interest between them....
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1answer
144 views

Intersex Genetalia [closed]

Hypothetically if someone who is born intersex has both sets of fully functioning genitalia (one male one female) could they potentially self fertilize? And if so would it be possible for any genetic ...
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1answer
476 views

What is gene,alleles and traits? [closed]

Gene is present on chromosomes so the alleles should be same as gene but what is difference between them and what is traits?
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1answer
292 views

How many Laws does Mendelian inheritance have?

I know of 3 laws of Mendelian inheritance : 1.law of segregation 2.law of dominance 3.law of independent assortment But, I've also come across a couple other "rules" of Mendelian inheritance such as ...
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1answer
1k views

What is the probability of genetic reincarnation? [closed]

Parents pass on 23 chromosomes to their children, with a 50/50 chance for each chromosome. Considering that people of a families lived over millennia in the same region the abundance of some ...
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1answer
773 views

Do any dogs have blue iris - not just sclera? [closed]

I was looking in to the question of whether any dogs in fact have "blue eyes"... A quick search gives plenty of information on and images of dogs with blue sclera and black iris. Every "blue-eyed" ...
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1answer
589 views

Dominant and recessive epistasis [closed]

Can anyone clarify my confusion about that the epistasis seen in "Labradors , an example of recessive or dominant epistasis? ? I am not getting definite results . It's dominant somewhere and ...
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1answer
42 views

Genes are linearly arranged on the chromosome [closed]

Could someone please explain the meaning of the statement given by TH Morgan: "genes are linearly arranged on chromosomes" Since according to my knowledge there are noncoding parts in ...
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2answers
80 views

Do identical twins have the same metabolism rate at birth?

Will monozygotic twins defecate at the same time if fed at the same time during the first weeks of life? They should have the same genetics (and epigenetics) since they are monozygotic and the same ...
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2answers
60 views

Possibility a child could genetically be also the child of its grandparent

When two people have sex, it is my understanding their diploid set of chromosomes is randomly split in half to create two haploid sets which unify into the diploid chromosome set of the child. For ...
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1answer
59 views

Large study showing that attraction to only the same sex has to do with your genes, published where?

Can someone please help me out and find and link me the study from a couple of years ago that showed how only same sex attraction, when the male cant become attracted to a woman, it has to do with ...
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1answer
67 views

Why does X inactivation happen?

Is X inactivation really important? Why don’t the dominant genes on one chromosome mask the recessive on the other chromosome? This happens in other sets of chromosomes so why exactly does this happen ...
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1answer
49 views

Probability for a megafauna specimen to exhibit a gene not present in either parent

What is the rough probability for a megafauna specimen to exhibit a gene not present in either parent? I'm looking, ideally, at the chance for one specific individual to be the first in a breeding ...
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1answer
50 views

Is there a name for survival of the fittest in a single family? [closed]

Imagine a case where the children of a bird each have a 50% chance of being born blind. But the bird always has on average 4 chicks. So on average 2 will be blind and 2 sighted. (Perhaps this could ...
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1answer
48 views

Confusion about result of monohybrid cross in Mendelian genetics

I was studying monohybrid crosses in genetics where the character considered is stem height. Whenever I came across punnett squares, I used to calculate the probability of the genotype of the ...
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1answer
88 views

Is evolution theory falsifiable by whether mutations result in a loss or gain of genetic information? [closed]

If I understand the theory correctly, evolution revolves around the process of adaptation of a being to its environment which results in the increment of survival and reproduction chances for that ...
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1answer
53 views

What impedes the understanding of genotype/phenotype relationship without statistics? [closed]

Most genetic research tries to establish a relationship between a certain genotype and certain phenotype. To me this is like trying to understand a system as a black box, where you try to establish ...
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1answer
134 views

Basic questions about human genome project [closed]

The "human genome" was sequenced by the Human Genome Project around 2000. But I don't understand what was done and what its significance is. Questions: Wasn't a single person's genome sequenced? I....
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1answer
168 views

Why the SNPs from the earliest human haplogroups are missing in people outside of Africa if they are infact the descendants of it?

The SNPs M91, P97, M31, P82, M23, M114, P262, M32, M59, P289, P291, P102, M13, M171, M118 from haplogroup A and SNPs M60, M181, P90 from haplogroup B are missing in people without recent African ...
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1answer
46 views

Neuroscience - A neuron with two types of synapses (electrical and chemical) at the same time

I learn that the nerves from the Peripheral Nervous System can carry signals from and to other organs of the body. I'm wondering if A Single Nerve carries 1) Only chemical signals 2) Only physical ...
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107 views

Can the environment affect genes and adaptation in offspring?

I recently read several articles that believe that environment can affect gene expression and this change will transfer down to the children. Some theorists believe that random mutations are more rare ...
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100 views

How should I interpret for example AA result, when SNPedia only has CC/CT/TT listed? [closed]

I don't know how to properly formulate this question because I'm new to this, so please edit this if you can... For example when I would check SNPedia for rs gene, it would have listed CC/CT/TT genes,...
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1answer
72 views

Non-Ethical Issues with Eugenics [closed]

Notwithstanding the obvious ethical issues with the idea of eugenics, I have read in many sources that eugenics has practical issues or otherwise "would not work", but I haven't been able to find an ...
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1answer
88 views

What can a human do in a short time (10-20 years) to improve their genome?

I'm wondering what can I do to make my children receive better genes? For example, can fitness, cold showering, studying etc. change my hereditary material and affect my children?
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59 views

Is it possible a cancer cell don't express any foreign antigens? [closed]

For example, there're tumor suppressor genes. Can we just delete them, without introducing neo-antigens? Would the resultant cells proliferate? If so, how do our immune system identify such cells?
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1answer
594 views

Why was the study of “Concordance of Monozygotic and Dizygotic twins for traits” designed in this way? [closed]

I am confused by the twin study 'Concordance of Monozygotic and Dizygotic twins for traits.' My questions arose from 3:17-4:17 of the video And this is the related data I have referred I have ...
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33 views

How many genes are involved in mitochondrial metabolism and/or related to mitochondria in humans?

I have made a list of about 68 genes which are involved in mitochondrial biogenesis, bioenergetics and mitophagy, but I'm sure there are more. Can someone please help me with how many genes in humans ...
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31 views

How does gene and genome relationship relate to genetic complexity?

From my understanding, gene and genome relationship would relate to genetic complexity because every species has a different genome and therefore the complexity ie. transcription, translation, ...
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21 views

The parasites in kingdom Monera and their evolution

The kingdom Monera was first to be on this planet In this kingdom we have the Eubacteria in which certain organisms have an ability to infect humans, plants and other organisms {parasitic in nature} ...
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57 views

Genotypes without Recombination

When given that the parent generation's genotypes are linked traits, how do you determine the genotypes of the F1 generation when no recombination has occurred. For example, given the parents BbNn ...
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1answer
41 views

Best fundamental literature about genetics [closed]

I'm seeking for good genetics literature. I'm not afraid of it's complexity, because I want to have relevant knowledges about molecular genetics. After Wikipedia articles and basic molecular-biology ...