Asked by Alexis Smith on Apr 29, 2024
Verified
What genotypic ratio would result from a cross between two individuals who are both heterozygous for a trait?
A) 100% homozygous dominant
B) 100% homozygous recessive
C) 50% homozygous dominant, 50% homozygous recessive
D) 25% homozygous dominant, 50% heterozygous, 25% homozygous recessive
E) 50% homozygous dominant, 50% heterozygous
Genotypic Ratio
The numerical relationship showing the assortment of genotypes resulting from a genetic cross.
Heterozygous
Having two different alleles of a particular gene or genes, resulting in genetic variation.
Homozygous Dominant
An individual possessing two identical dominant alleles for a particular trait.
- Analyze genotypic and phenotypic ratios resulting from monohybrid and dihybrid crosses.
Verified Answer
ZK
Zybrea KnightMay 05, 2024
Final Answer :
D
Explanation :
When two individuals who are heterozygous for a trait are crossed, the genotypic ratio of their offspring is 1:2:1 for homozygous dominant : heterozygous : homozygous recessive. Therefore, the best choice is D, which represents this ratio.
Learning Objectives
- Analyze genotypic and phenotypic ratios resulting from monohybrid and dihybrid crosses.
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