A test cross is used to determine
Correct answer: A. The genotype of a dominant phenotype individual
- A. The genotype of a dominant phenotype individual
- B. The number of chromosomes
- C. Mutation rates
- D. Linkage groups
Explanation
A test cross between an individual showing dominant phenotype and a homozygous recessive reveals whether the dominant is homozygous or heterozygous.
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About Gene Linkage and Crossing Over
Linked genes lie on the same chromosome and tend to pass together, unlike genes that assort independently on different chromosomes. The topic connects linkage with homologous pairing, crossing over during prophase I of meiosis, recombinant and parental offspring, and recombination frequency as an estimate of gene distance.
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