Question

which kind of allele results in the trait indicated by the green color being expressed in the individuals shown here?
○ dominant
○ recessive
○ x - linked recessive
○ x - linked dominant
(there is a pedigree chart on the right with a square labeled ww (green), a circle labeled ww, their offspring: a square ww (green), a circle ww, a square ww, a circle ww (green))

Explanation:

Step1: Analyze green individuals' genotypes

Green individuals have genotypes Ww (heterozygous).

Step2: Compare with non-green individuals

Non-green individuals have genotype ww (homozygous recessive).

Step3: Determine allele expression

W is expressed in heterozygotes (Ww), so W is dominant.

Answer:

A. dominant