Consider the following statements:
- i. Mendel is called the father of genetics.
- ii. The law of segregation states that each gamete receives two alleles for a trait.
- iii. In a monohybrid cross, the F₂ phenotypic ratio is 3 : 1.
- iv. The law of independent assortment works only for traits on different chromosomes.
Select the group of correct statements only:
- Ai and ii
- Bi and iii
- Cii, iii and iv
- Di, iii and iv
Show answer and explanation
Correct answer: (d) i, iii and iv
Explanation
- i. Correct: Mendel is called the father of genetics.
- ii. Wrong: by the law of segregation, each gamete receives only one allele for a trait, not two.
- iii. Correct: in a monohybrid cross, the F₂ phenotypic ratio is 3 : 1.
- iv. Correct: genes assort independently when they are on different chromosomes (or far apart on the same one). Genes close together on a chromosome are linked and tend to be inherited together.
So i, iii and iv are correct.