Question

7 which of the following demonstrates the most significant difference between asexual and sexual reproduction? (aks 7d)
a the number of chromosomes is reduced during sexual reproduction.
b there is a genetic variation as a result of sexual reproduction.
c the chromosome number is reduced during asexual reproduction.
d the appearance of the organism is changed as a result of asexual reproduction.

Explanation:

To solve this, we analyze each option:

• Option A: Chromosome number reduction (meiosis) occurs, but genetic variation is a more significant difference between asexual (no variation, clones) and sexual (variation via gamete fusion/recombination) reproduction.
• Option B: Sexual reproduction involves gametes from two parents, leading to genetic variation (due to crossing over, independent assortment, and fertilization). Asexual reproduction produces genetically identical offspring. This is the most significant difference.
• Option C: Asexual reproduction (e.g., mitosis) maintains chromosome number, so this is incorrect.
• Option D: Asexual reproduction produces clones, so appearance (and genetics) are identical to the parent; this is false.

Answer:

B. There is a genetic variation as a result of sexual reproduction.