Question

Choose the correct statements:
[A.] Asexual reproduction preserves genetic information.
[B.] Hybridization leads to multiply desirable genes.
[C.] Restriction enzyme adds methyl group to DNA.
[D.] Genetic engineering changes the phenotype of the organism.

• A. A and D
• B. B and C
• C. C and D
• D. A and C

Hint:

Asexual reproduction = genetic clone; Genetic engineering = phenotype change.

Answer 1

The Correct Option is A

Let’s evaluate each statement: - A. True: Asexual reproduction produces offspring that are genetically identical to the parent, hence preserving genetic information.
- B. False: While hybridization can combine traits from two parents, it doesn't guarantee multiplication of all desirable genes due to recombination.
- C. False: Restriction enzymes cut DNA at specific sites; methyl groups are added by methyltransferases, not by restriction enzymes.
- D. True: Genetic engineering introduces foreign genes that can change the phenotype (observable traits) of the organism.
So, only statements A and D are scientifically correct.

Answer 2

Choose the correct statements:

[A.] Asexual reproduction preserves genetic information.
[B.] Hybridization leads to multiply desirable genes.
[C.] Restriction enzyme adds methyl group to DNA.
[D.] Genetic engineering changes the phenotype of the organism.

Explanation:
Statement A is correct because asexual reproduction involves the production of offspring without the fusion of gametes, resulting in genetically identical individuals and thus preserving genetic information.

Statement B is incorrect. Hybridization involves crossing different species or varieties to combine desirable traits, but it does not necessarily multiply desirable genes; it combines them.

Statement C is incorrect. Restriction enzymes cut DNA at specific sequences; they do not add methyl groups. DNA methylation is carried out by methyltransferase enzymes.

Statement D is correct. Genetic engineering involves modifying an organism's genetic material, which often leads to changes in the organism’s phenotype (observable traits).

Correct Answer: A and D