Question

number correct:16 number incorrect:10 what would be the genotype and phenotype of the baby produced by the following fertilization event? (key: g = yellow and g = green) image of a sperm with g and an egg with g a. the genotype would be green and the phenotype would be gg. b. the phenotype would be green and the genotype would be gg. c. the phenotype would be gg and the genotype would be yellow. d. the genotype would be gg and the phenotype would be yellow. click to choose your answer below:

Explanation:

To determine the genotype and phenotype, we analyze the fertilization: the sperm has allele \( G \) and the egg has allele \( g \). So the offspring's genotype is \( Gg \). The key states \( G \) (yellow) is dominant, so the phenotype (physical trait) is yellow. Let's check options:

• Option A: Confuses genotype (genetic makeup) and phenotype (trait); genotype can't be "green" and phenotype can't be \( GG \). Eliminate.
• Option B: Genotype \( gg \) would require two \( g \) alleles, but we have \( G \) and \( g \). Phenotype "green" would be for \( gg \), but genotype here isn't \( gg \). Eliminate.
• Option C: Phenotype is a trait (like yellow/green), not \( gg \); genotype is genetic (like \( Gg \)), not "yellow". Eliminate.
• Option D: Genotype \( Gg \) (from \( G \) and \( g \)) and phenotype yellow (since \( G \) is dominant) matches.

Answer:

D. The genotype would be Gg and the phenotype would be yellow.