In a dihybrid cross, what fraction of offspring will display both recessive phenotypes?
Correct answer: D. 1/16
- A. 1/8
- B. 1/4
- C. 1/32
- D. 1/16
Explanation
d) 1/16 Explanation: This option suggests that 1/16 of the offspring will display both recessive phenotypes for the two traits. This is the correct answer. In a dihybrid cross, the probability of obtaining both recessive alleles for two genes is 1/4 * 1/4 = 1/16.
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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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