Self-fertilization of F₁ dihybrids, following independent assortment, will result in:
Correct answer: D. 3/16 tall, wrinkled; 3/16 round dwarf
- A. 3/16 tall, round: 3/16 dwarf, wrinkled
- B. 9/16 tall, round : 1/16 dwarf, round
- C. 9/16 tall, wrinkled: 3/16 dwarf, round
- D. 3/16 tall, wrinkled; 3/16 round dwarf
Explanation
In a dihybrid cross, the phenotypic ratio is 9:3:3:1, which includes 3/16 tall wrinkled and 3/16 round dwarf.
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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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