When hybrids are crossed, the genotype ratio of the offspring is
Correct answer: C. 1:2:1
- A. 1:1
- B. 3:1
- C. 1:2:1
- D. 4:1
- E. 3:2
Explanation
This is known as a monohybrid cross, involving the inheritance of a single trait (e.g., one gene with two alleles). The genotype ratio can be represented as follows:• 1/4 of the offspring are homozygous dominant (e.g., TT).• 1/2 of the offspring are heterozygous (e.g., Tt).• 1/4 of the offspring are homozygous recessive (e.g., tt).This ratio is based on Mendel's law of segregation, which describes how alleles segregate during gamete formation.
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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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