What phenotype would you expect from a homozygous dominant cross?

What phenotype would you expect from a homozygous dominant cross?

• A. All green
• B. All yellow
• C. 50% green and 50% yellow
• D. No green

Answer: (A)

In a homozygous dominant cross, both parents possess identical alleles for a specific trait. Assuming the trait being evaluated is color and we designate green as the dominant trait and yellow as the recessive trait, a homozygous dominant cross would involve two individuals with the genotype for green (let's denote this as GG). When two homozygous dominant individuals (GG) are crossed, the resulting offspring will inherit one dominant allele from each parent. This leads to the entire progeny being genetically identical with the genotype GG. Since green is the dominant phenotype, all offspring will express the dominant trait, resulting in the phenotype of all the offspring being green. Thus, the expectation from a homozygous dominant cross is for all offspring to display the dominant phenotype, confirming that the correct answer is all green. This understanding is foundational in genetics, especially in Mendelian inheritance patterns where dominant and recessive traits are assessed.

In a homozygous dominant cross, both parents possess identical alleles for a specific trait. Assuming the trait being evaluated is color and we designate green as the dominant trait and yellow as the recessive trait, a homozygous dominant cross would involve two individuals with the genotype for green (let's denote this as GG).

When two homozygous dominant individuals (GG) are crossed, the resulting offspring will inherit one dominant allele from each parent. This leads to the entire progeny being genetically identical with the genotype GG. Since green is the dominant phenotype, all offspring will express the dominant trait, resulting in the phenotype of all the offspring being green.

Thus, the expectation from a homozygous dominant cross is for all offspring to display the dominant phenotype, confirming that the correct answer is all green. This understanding is foundational in genetics, especially in Mendelian inheritance patterns where dominant and recessive traits are assessed.