New answers tagged human-genetics
This should be pretty easy to demonstrate. Over the two generations, there would be 200-300 mutations in the entire genome of 3.3*109 base pairs, i.e. about 1*10-7 of the base pairs should be altered. If Time Traveler is male, for example, imply sequencing the Y chromosome and mitochrondrial DNA and comparing to the paternal grandfather and maternal ...
Claudia's dad is not a taster, so he is tt. He passes one allele on to his daughter. Since he is homozygous, he can only pass t. Claudia is a taster, so she must have the dominant allele from her mother, who is also a taster. Thus, Claudia is Tt.
Actually there is a specific term for this called hemizygous / hemizygote - meaning that that only one allele of the gene is present. Therefore males cannot be heterozygous for genes on the X or Y chromosome (not counting for gene duplication or other chromosome disorders) since they naturally carry only one copy of these chromosomes.
It sounds like you pretty much have it. Hemophilia is recessive, meaning that a single function copy of the necessary clotting genes will be sufficient to function. So a female can inherit defective genes on one X chromosome and functional genes on the other and be perfectly fine. However, if a male inherits defective genes on one X chromosome he will have ...
Because males only have one X chromosome, they can only have one copy of any gene found on the X chromosome, and therefore only have one allele. This means that in the case of a recessive disorder like hemophilia, should they happen to inherit a recessive allele from their mothers, they will have the recessive (disordered) phenotype because there is no other ...
Haemophiliac females are rare but they can survive just like affected males do. However, the case is slightly more complicated in women because of menstruation. I could not find an article from any medical journal but this site seems authentic enough for a reference.
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