Question

in peas, yellow seed color (y) is dominant to green seed color (y). which describes an organism that has nonidentical alleles for seed color?
○ yy and has green seeds
○ yy and has yellow seeds
○ yy and has yellow seeds
○ yy and has green seeds

Explanation:

• Allele concept: Alleles are different forms of a gene. Non - identical alleles mean heterozygous.
• Dominance - recessiveness: Since \(Y\) (yellow) is dominant over \(y\) (green), the presence of at least one \(Y\) allele will result in the dominant (yellow) phenotype.
• Genotype analysis:
• \(yy\) has identical alleles (homozygous).
• \(YY\) has identical alleles (homozygous).
• \(Yy\) has non - identical alleles (heterozygous). And because of the dominance of \(Y\) over \(y\), \(Yy\) will have yellow seeds.

Answer:

B. \(Yy\) and has yellow seeds