Question

question- do you get it?
which of the following statements are true?
i. crossing over involves the exchange of genetic material between homologous chromosomes.
ii. independent assortment occurs during metaphase i of meiosis.
iii. random fertilization occurs after meiosis, when gametes from two different individuals meet.
a i and iii only
b i only
c i and ii only
d i, ii, and iii

Explanation:

• Statement I: Crossing over is defined as the exchange of genetic material (segments of DNA) between homologous chromosomes during meiosis, so this is true.
• Statement II: Independent Assortment refers to the random arrangement of homologous chromosome pairs at the metaphase plate during metaphase I of meiosis, leading to different combinations of maternal and paternal chromosomes in gametes. This is true.
• Statement III: After meiosis produces gametes (sperm and egg), random fertilization occurs when a sperm (from one individual) randomly fuses with an egg (from another individual), so this is true.

Since all three statements (I, II, and III) are true, the correct option is D.

Answer:

D. I, II, and III