Heterozygous for both traits genotype = BbFf
Homozygous for both traits genotype = bfbf
The term "identical genes received during the zygote period of development" is homozygous. The parents of a person with homozygous features gave them one copy of each allele. Both dominant and recessive alleles are possible.
Children with heterozygous traits inherit a dominant gene from one parent and a recessive allele from the other parent.
Let the alleles for beak color be:
Dominant allele = B
Recessive allele = b
Let the alleles for feather color be:
Dominant allele = F
Recessive allele = f
Therefore,
Parent 1 with heterozygous traits will have genotype = BbFf
(because it is heterozygous for both the traits)
Parent 2 with homozygous traits will have genotype = bfbf
(because it is homozygous for recessive traits)
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