Questions tagged [genetics]

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

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Mendelian dominant trait involved with Hypodontia [closed]

If the absence of teeth is a dominant trait, then why is it not seen in generations? My teacher taught that absence of teeth is a mendelian dominant trait, but why don't we see this trait if it is ...
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239 views

Mutations/deletions with CRISPR

I need to stop some protein from being active and searching for some universal way to do so. In mammalians. With CRISPR it is possible to knock-out the entire gene. But it's a little complicate (...
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114 views

X-recessive disorders and genetic markers

Please observe the following pedigree of a family with a x-recessive disease (bleeder disease). The A's are genetic markers so close to the disease gene that recombination is negligible. I ...
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1answer
63 views

Why is sickle cell trait expressed in half of all cells rather than all cells containing half-sickled haemoglobin

If sickle cell trait is due to be heterozygous with respect to a single gene mutation on the haemoglobin β-globin chain, why is it the case that ~50% of RBCs are sickled rather than half of the ...
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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
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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2answers
2k views

What are sex linked traits?

Which of the two definitions of sex-linked trait is correct? Traits controlled by genes present on the non-homologous region of sex chromosomes are called sex-...

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