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Humans carry two copies of genes, namely XX and YY. In terms of offspring genotype, the...

Humans carry two copies of genes, namely XX and YY. In terms of offspring genotype, the possible sex variants are XX,YY,XY,XX,YY,XY, and YX.

(a) Write the sample space and its number.

(b) What is the probability that the offspring is homozygous?

(c) What is the probability that the offspring is heterozygous?

(d) What is the probability that offspring carries at least one variant?

Note: A person who carries two identical variants of a gene is called homozygous, otherwise heterozygous.

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