Question

For the following four very diversified human populations, what are the greatest and least number of alleles for an autosomal gene, a X- linked gene, and a Y-linked gene, respectively?

– Population I: 10 females and 5 males

–Population II: 5 females and 10 males

– Population III: 15 females

– Population IV: 15 males

Answer 1

	autosomal gene	X-linked gene	Y-linked gene
greatest number	Population IV(We know both males and females possess same number of autosome, but the number of cells are greater in males than the females. So 15 males have greater number of autosomal alleles than 15 females)	Population IIi(In population III total number of X-chromosomes are 30, which is higher than each population. As there are greater number of X-chromosome, the number of X-linked alleles also be higher)	Population IV(We know only the males contain the Y-chromosomes. So where the number of males are higher, there the numbers of Y-linked alleles also be higher)
least number	Population III(Population III contains only the females, so number of cells will be lower in their body. So the numbers of autosomal alleles will be lower here)	Population IV(This population made up of 15 males so the number of X-chromosome is least here, hence it contains minimum number of X-linked alleles)	Population III(Population III is made up of 15 females. We know that females don't contain Y-chromosome. So there is no chance to get any Y-linked alleles)

	Number of autosome	Number of X-chromosome	Number of Y-chromosome
Population I	30	25	5
Population II	30	20	10
Population III	30	30	0
Population IV	30	15	15