NEET 2026
- Exam
- NEET
- Year
- 2026
- Subject
- Biology
- Chapter
- Chapter
NEET 2026 · Biology · Chapter
While analyzing a monohybrid cross between homozygous tall and...
While analyzing a monohybrid cross between homozygous tall and dwarf pea plants, a student notes several genetic phenomena. Which of the following can be specifically explained on the basis of Mendel's Law of Dominance?
A. The appearance of only tall plants in the generation.
B. The observation that alleles do not show any blending and both characters are recovered as such in the generation.
C. The phenotypic proportion of 3:1 observed among the progeny.
D. The premise that the trait for plant height is controlled by discrete units occurring in pairs.
E. The separation of alleles during gamete formation such that a gamete receives only one of the two factors.
Choose the correct answer from the options given below:
A. The appearance of only tall plants in the generation.
B. The observation that alleles do not show any blending and both characters are recovered as such in the generation.
C. The phenotypic proportion of 3:1 observed among the progeny.
D. The premise that the trait for plant height is controlled by discrete units occurring in pairs.
E. The separation of alleles during gamete formation such that a gamete receives only one of the two factors.
Choose the correct answer from the options given below:
Options
- AA, C, D and E only
- BB, D and E only
- CA, C and D only
- DA, B and C only
Correct answer
C. A, C and D only
Step-by-step solution
According to Mendel's Law of Dominance:
1. Characters are controlled by discrete units called factors.
2. Factors occur in pairs.
3. In a dissimilar pair of factors, one member of the pair dominates (dominant) the other (recessive).
This law explains the expression of only one of the parental characters in the generation (Statement A) and the phenotypic proportion of 3:1 obtained in the generation (Statement C). Statement D is a direct postulate of the Law of Dominance.
Statements B and E are explained by the Law of Segregation, which states that alleles do not blend and segregate during gamete formation such that a gamete receives only one of the two factors.
Therefore, only statements A, C, and D can be explained on the basis of the Law of Dominance.
Answer: A, C and D only
1. Characters are controlled by discrete units called factors.
2. Factors occur in pairs.
3. In a dissimilar pair of factors, one member of the pair dominates (dominant) the other (recessive).
This law explains the expression of only one of the parental characters in the generation (Statement A) and the phenotypic proportion of 3:1 obtained in the generation (Statement C). Statement D is a direct postulate of the Law of Dominance.
Statements B and E are explained by the Law of Segregation, which states that alleles do not blend and segregate during gamete formation such that a gamete receives only one of the two factors.
Therefore, only statements A, C, and D can be explained on the basis of the Law of Dominance.
Answer: A, C and D only