Question

if we examine the diagrams of mitosis and meiosis, we see that in both cases, dna replication occurs. yet one process, mitosis, ensures while the other, meiosis, facilitates genetic variation of daughter cells. identify the choice that does not explain genetic variation of daughter meiosis.
a there is a reduction of the chromosome number from diploid to haploid daughter cells.
b meiosis is followed by fertilization: the union of gametes to create a diploid zygote.
c in metaphase i, each chromosome moves independently of the others: a process called independent assortment.
d during prophase i, the homologous pairs of chromosomes often exchange chromosome segments via crossing over

Explanation:

• Option A: Reduction of chromosome number from diploid to haploid in meiosis contributes to genetic variation as it results in unique combinations of genetic material in gametes.
• Option B: Meiosis followed by fertilization combines genetic material from two different gametes, but this is about the overall process of sexual - reproduction rather than a direct mechanism of genetic variation within meiosis itself.
• Option C: Independent assortment in metaphase I leads to different combinations of chromosomes in daughter cells, increasing genetic variation.
• Option D: Crossing - over in prophase I exchanges genetic material between homologous chromosomes, creating new combinations of alleles.

Answer:

B. Meiosis is followed by fertilization: the union of gametes to create a diploid zygote.