To check the homozygosity or heterozygosity of the apparently dominant trait, we do the test cross by crossing it with:
Correct answer: C. Homozygous Recessive trait
- A. Any Dominant trait
- B. Homozygous dominant trait
- C. Homozygous Recessive trait
- D. Heterozygous dominant trait
- E. A self-cross
Explanation
By crossing an individual showing a dominant trait with a homozygous recessive individual, we can determine the genotype of the dominant individual. If the dominant individual is homozygous dominant, then all the offspring will show the dominant trait, but if the individual is heterozygous, then half of the offspring will show the dominant trait, and half will show the recessive trait.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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