Match List I with List II.List I List II A. Two or more alternative forms of a gene I. Back cross B. Cross of F1 progeny with homozygous recessive parent II. Ploidy C. Cross of F1 progeny with any of the parents III. Allele D. Number of chromosome sets in plant. IV. Test cross
Choose the correct answer from the options given below.
| List I | List II |
|---|---|
| A. Two or more alternative forms of a gene | I. Back cross |
| B. Cross of F1 progeny with homozygous recessive parent | II. Ploidy |
| C. Cross of F1 progeny with any of the parents | III. Allele |
| D. Number of chromosome sets in plant. | IV. Test cross |
Answer: (B) A-III, B-IV, C-I, D-II. Answer: (B) A-III, B-IV, C-I, D-II Solution: Two or more alternative forms of a gene are alleles (A-III).
- A.A-II, B-I, C-III, D-IV
- B.A-III, B-IV, C-I, D-II✓
- C.A-IV, B-III, C-II, D-I
- D.A-I, B-II, C-III, D-IV
Correct Answer
(B) A-III, B-IV, C-I, D-II
Solution & Explanation
Answer: (B) A-III, B-IV, C-I, D-II Solution: Two or more alternative forms of a gene are alleles (A-III). A cross of the F1 progeny with the homozygous recessive parent is a test cross used to determine genotype (B-IV). A cross of F1 progeny with any of the parents is a back cross (C-I). The number of chromosome sets in a plant is its ploidy (D-II). This matching corresponds to option (b). NCERT Reference: NCERT Class XII, Ch 4, p.58, lines 33-36: "In a typical test cross an organism (pea plants here) showing a dominant phenotype (and whose genotype is to be determined) is crossed with the recessive parent instead of self-crossing."