Question

Which one of the following can be explained on the basis of Mendel’s Law of Dominance?
A. Out of one pair of factors one is dominant and the other is recessive.
B. Alleles do not show any expression and both the characters appear as such in F₂ generation.
C. Factors occur in pairs in normal diploid plants.
D. The discrete unit controlling a particular character is called factor.
E. The expression of only one of the parental characters is found in a monohybrid cross.
Choose the correct answer from the options given below:

• A. A, B and C only
• B. A, C, D and E only
• C. B, C and D only
• D. A, B, C, D and E

Answer 1

The Correct Option is B

Mendel’s Law of Dominance states that when two different alleles are present for a trait, the dominant allele will mask the expression of the recessive allele in the heterozygous condition.

- A is true because one factor (allele) is dominant and the other recessive.

- C is true because Mendel’s experiments confirmed that alleles occur in pairs in diploid organisms.

- D is true because Mendel referred to the units controlling traits as ”factors,” which are now known as genes.

- E is true because in a monohybrid cross, only the dominant trait is expressed in the F1 generation.