A test cross distinguishes between:
Correct answer: D. A homozygous dominant and heterozygous form
- A. 2 homozygous forms
- B. Homozygous recessive and heterozygous form
- C. 2 heterozygous forms
- D. A homozygous dominant and heterozygous form
Explanation
It is a mating in which an individual showing a dominant phenotype is crossed with an individual showing its recessive phenotype. This cross finds out the homozygous or heterozygous nature of the genotype
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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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