AP BIOLOGY

Detailed explanation-1: -A male and female bison that are both heterozygous for normal skin pigmentation produce an albino offspring (aa). Which of Mendel’s principles explain(s) why the offspring is albino? segregation only.

Detailed explanation-2: -A male and female bison that are both heterozygous for normal skin pigmentation (Aa) produce an albino offspring (aa).

Detailed explanation-3: -If an organism has two copies of the same allele, for example AA or aa, it is homozygous for that trait. If the organism has one copy of two different alleles, for example Aa, it is heterozygous.

Detailed explanation-4: -A person who is heterozygous Aa has the same phenotype as a person who is homozygous AA because skin cells that have at least one ‘A’ allele produce enough melanin to result in normal skin color.

Detailed explanation-5: -However, recessive traits reappeared in the second generation (F2). Each individual carries a pair of factors for each trait, and they separate from each other during fertilisation. This is the basis of Mendel’s principle of segregation.