Questions tagged [reproduction]

The biological process by which new individuals are formed.

Filter by
Sorted by
Tagged with
0
votes
0answers
18 views

What is the relation between “classes” (stem cell, proliferative and differentiating) and the types (Ad, Ap, B) of the spermatogonium?

Describing the question in the title further, The section, Systems Toxicologic Pathology, Dianne M. Creasy, Robert E. Chapin, in Haschek and Rousseaux's Handbook of Toxicologic Pathology (Third ...
2
votes
0answers
23 views

Is self-fertilization in hermaphrodite animals an asexual or sexual reproduction?

There are various Hermaphrodite animals, which can self fertilize. So can this be called sexual reproduction because there is fusion of gametes though from the same individual ? Or asexual because ...
0
votes
1answer
49 views

Is “Cloning” exact or almost similar to parent?

I was studying "Reproduction in Organism" as an interest of my own and there was a line offspring produced through single parent are exact copies of their parent. Also, they are genetically ...
0
votes
1answer
30 views

How do fish transport egg to, and out of, coelom?

How do gametes get into coelom, and, later out of it? Excretion can be under quite heavy pressure, see https://www.youtube.com/watch?v=1OsRbuEINXI
0
votes
0answers
12 views

Tips on sexing of a pet Green Anole? (Besides length)

So I'm looking into lizard breeding (Mainly Leopard Geckos and Anoles) I catch wild ones and also buy them around, but some of them are very close in size and length. I have some males that I know ...
2
votes
1answer
51 views

Difference between sexual and asexual spore

This Wikipedia article on Spores mentions this: In biology, a spore is a unit of sexual or asexual reproduction that may be adapted for .... What is the difference between the sexual spore and ...
1
vote
0answers
19 views

How does DNA shape a living organism? [closed]

I'm haven't studied biology so excuse me if I'm getting something wrong. I'm trying to understand how the DNA from a sperm and egg cause the egg too multiply and form a perticular shape (shape of a ...
0
votes
0answers
30 views

Is there any known pharmaceutical or chemical that could cause infertility in humans in a single dose with few or no other effects?

Is there any known pharmaceutical or chemical that could cause infertility in humans in a single dose with few or no other effects? The context is that a number of claims are circulating about ...
0
votes
1answer
13 views

Will moth larvae pupate in response to food deprivation

Context: Trying to exterminate a clothes moth infestation. Supposing you have a room with clothes moths, or rather, with clothes moth eggs and larvae. Suppose then, that you remove all of the soft ...
0
votes
3answers
71 views

Why does inbreeding cause genetic defects, but cell division in one's own body does not?

I was watching a DNA transcription video when I realized that cells basically create copies of DNA all the time in our body. There may be a few mutations/errors, but it works out fine. However, when ...
0
votes
0answers
14 views

How did the tunicates evolve ability to reproduce by budding?

It seems that last common ancestor of chordates and last common ancestor of bilaterians could not reproduce by budding. If so, how it comes that tunicates developed budding? Are there other ...
0
votes
1answer
33 views

Where does Embryo Implantation occur? [closed]

Where does the embryo get implanted? If it is in the uterus side wall, why is the embryo shown hanging from top in some pictures?
1
vote
2answers
31 views

When does LH surge actually occur?

I’ve seen many textbooks saying that LH surge occurs in the Follicular phase while others say it occurs in the Ovulatory phase. I’ve tried googling this, only to end up knowing two things: 1) It ...
0
votes
1answer
21 views

How can I make legal mature female Cannabis plants to Flower in home during March (springtime)? [closed]

In December 2019 I purchased 4 Cannabis seeds Legally in Canada.Two of my plants are now about 100 cm tall. I am using wide-spectrum LED grow lights and have fertilized them both. I started with 16 ...
1
vote
0answers
39 views

Can a Chihuahua and a Great Dane breed the “old fashioned way?”

I saw this vid: https://youtu.be/eu2qe-FNtjg And this question crossed my mind. The dog in the video seems to be boxer sized... And I wonder if that strategy would work with something a little ...
2
votes
1answer
99 views

Can I execute/model a genome? [closed]

Hi I am wondering if we can execute a genome on the sub-cellular level by running it on the computer. What I mean is using the genome as data to examine by having the cells reproduce and see what ...
9
votes
2answers
270 views
+50

Sperm formation - Frequent Ejaculations

This is not a personal medical question and this is not my case situation. I just want to understand the science and the reasons behind my questions asked below. Please help me understand the science ...
0
votes
0answers
18 views

What is Balbiani's vitelline body function?

I tried searching on Google Scholar but I found little to no information about this Balbiani's vitelline body. I don't even know why it is called vitelline...I've been taught that it can be seen ...
0
votes
0answers
34 views

Why do humans start menstruating so early?

Wikipedia's article on teenage pregnancy says: Pregnancy can occur with sexual intercourse after the start of ovulation, which can be before the first menstrual period (menarche) but usually occurs ...
0
votes
0answers
24 views

Do spiders lay their eggs on the same schedule, whether they have mated or not?

I have heard of many instances of unmated spiders laying egg sacs which are, of course, incapable of developing. Apart from a very few exceptions, female spiders release stored sperm from the ...
0
votes
0answers
19 views

Why do eels go through dams?

I was interested in eels after learning about dams. I learned that there are such things as eel ladders as there are salmon ladders for the animals to swim up the damns to continue their journey, but ...
2
votes
0answers
72 views

What causes the shape of the dense structure in this “giant squid egg” sac?

The YouTube video Swimming Next To Giant Squid Egg shows a giant egg of a squid and/or an egg of a giant squid. Text in the video's description includes the text quoted below, which indicates that the ...
0
votes
0answers
18 views

Plant hybridization - cross clade cross pollination possibility

Is it possible for monocots, like dates, to cross-pollinate with eudicots, such as olives? What is the general rule for how closely related species must be to form hybrids organically?
3
votes
1answer
1k views

What is meant by Physarum polycephalum having 720 sexes?

There is currently some media hype about the slime mold Physarum polycephalum, which will soon be exhibited in the Paris zoo. This was my first time hearing about slime molds, but so far so good. ...
3
votes
1answer
59 views

What's it called when a male seahorse gets “inseminated”?

I am looking for the scientific term for the process where a male seahorse receives eggs from the female. For example, we usually say, "the male inseminates the female with sperm." What is the correct ...
0
votes
1answer
69 views

Can foraging worker ants become queens?

The TL;DR is in the subject line. The back story is as follows: I am combating ants in my high-rise apartment unit. One piece of online advice was to vacuum regularly, and pay attention to edges of ...
0
votes
0answers
23 views

Do large fathers engender a higher probability of caesarian section?

If a large father has a child with a smaller woman, i.e. 90kg and 45kg, are there higher chances that the baby will be too big to slip through the birth canal, resulting in a C-section?
1
vote
2answers
60 views

Is there an example of a species wherein the female lays eggs in the male?

There are of course many species which lay eggs in the bodies of another species and also many species where either the male is eaten after mating or the male dies soon thereafter. So it seems ...
3
votes
0answers
60 views

Is mating between human and non-human primates theoretically possible?

I wonder if it is theoretically achievable to produce living offspring between a human and a non-human primate. Great apes have 24 pairs of chromosomes compared to our 23, however, it is known that a ...
0
votes
1answer
257 views

Difference between fertilin and fertilizin

I am confused between fertilin and fertilizin.Are these two same or different? Here are a few sources i referred Julian Lombardi (auth.) - Comparative Vertebrate Reproduction-Springer US (1998) Page ...
-1
votes
1answer
55 views

Sexual Reproduction in Humans

Is the human egg cell (ova) considered motile? We know that is is not actively motile but it is transferred via the fallopian tube to the uterus. Does that make it motile?
1
vote
0answers
16 views

Why don't most life forms show uniqueness in progeny? [duplicate]

I guess everyone must have observed this. Dogs, cats, and most of all insects (including mosquitoes) appear more or less the same. Why is there so little variation in their offspring, unlike humans, ...
1
vote
1answer
96 views

How can space travel affect women’s fertility?

From Time: The reasoning behind the prerequisite, according to officials, is that spaceflight could potentially harm the women's fertility. How can space travel affect a woman’s fertility?
0
votes
0answers
75 views

Why do hydrophytes lack endothecium

So I read that endothecium is a layer in the anther wall and it usually contains layers of alpha cellulosic fibrous bands that help in the dehiscence of anther Further hydrophytes lack this layer So ...
0
votes
0answers
79 views

Does the Chorion Completely enclose the Amnion in Humans

When a human baby is born "en caul" (aka enclosed in the amniotic sac) the amnion detaches from the chorion and the baby comes out in the sac with the chorion still attached to the placenta. If the ...
0
votes
0answers
31 views

Are there insect species where the male occasionally attacks/eats the female after mating?

While I realize this would be a very ineffective propagation strategy, it could be an aberration that is occasionally observed in the same way that males are not always eaten. Could males "pretend" ...
1
vote
0answers
49 views

Why are dolphins born tail first?

I heard most dolphins are born tail first. I have read many explanations from books and internet articles and they said that dolphins are born tail first to prevent them from drowning. But now I don'...
1
vote
2answers
30 views

Is there natural occurrence of induced pluripotency / expression of Yamanaka factors and what is the evolutionary explanation of that?

Is there natural biological processes in which the full (full reprogramming into pluripotent state) or partial (partial reprogramming, stopped before point-of-no-return, preserving the functional ...
1
vote
1answer
56 views

How do animals learns seductional behaviour?

I was curious how the gender behaviour, the male role or female role, is known in mammals. Do mammals instinctively know how to do seduce the opposed sex or do the animals learn it from their parents/...
0
votes
1answer
19 views

Is newly produced sperm healthy if there was previous DNA damage?

I read that sperm cannot repair DNA damage. So does this mean that if your sperm has DNA damage, then all of your sperm (whether present or future) has DNA damage? Or does it just mean that the ...
0
votes
1answer
76 views

Animal reproduction when resources are scarce

(This question is aimed at animals that take care of their young, e.g. dolphins.) As I understand it, most animals reproduce if possible. The only way they don't is because they run out of resources. ...
1
vote
0answers
37 views

Mother's physiological response to baby crying

I have read several articles [1,2] that talks about the physiological response in mothers when their babies cry. Is there any studies performed and published that show that this is not true ? https:/...
3
votes
0answers
41 views

Can sperm cells penetrate the cell membrane of non-ovum cells?

Sperm cells have tiny bags of enzymes on their tip (the acrosome) which allow them to penetrate the ovum. My question is whether or not the process that allows sperm cells to penetrate the cell ...
1
vote
2answers
111 views

Has an ectopic pregnancy's blastocyst ever been made to implant?

Has an ectopic pregnancy's blastocyst ever been successfully extracted from the Fallopian tube and made to implant in the uterus?
0
votes
1answer
55 views

How can inbreeding be used for selecting mutations?

I understand that inbreeding, after a number of generations of crossing genetically related individuals eventually yields homozygotes, however I can't seem to understand how it can be used for ...
1
vote
0answers
1k views

What are the advantages of sexual reproduction over asexual reproduction? [closed]

What are the advantages of sexual reproduction over asexual reproduction? How does variation influence ecological and evolutionary success?
5
votes
2answers
333 views

Why can't complex multicellular organisms reproduce by regeneration? [closed]

My textbook says that regeneration isn't possible in complex multicellular organisms. But why? Why can't specialized cells be present in the bodies of complex multi cellular organisms which can ...
2
votes
0answers
39 views

Volvox Cellular Reintegration

A couple of days ago, I answered this question over on worldbuilding.SE with some information about volvoxes, and commenter Liam Proven pointed out that one of the claims I made was dubious. I had ...
1
vote
0answers
42 views

How can twins be born months apart? [closed]

How can twins be born months apart? What is the science behind it?
1
vote
0answers
24 views

Beyond anabolism, what are factors that restrict growth rate?

Beyond obvious constraints in the case of nutrient limitation, what can explain the relatively slow growth rate of cells in rich media? Lab strains of E. coli grow really, really fast. The cell ...

1
2 3 4 5
9