Question

The exchange of genetic material between
chromatids of paired homologous chromosomes
during first meiotic division is called
(a) transformation (b) chiasmata
(c) crossing over (d) synapsis

Answer 1

Answer:

C) crossing over

Explanation:

it occurs during pachytene and is also called as recombination

Answer 2

Answer is option "c"

Explanation:

• Crossing over is a process by which chromatids of homologous chromosomes exchange portions of genetic material, usually during tetrad formation of meiosis. Crossing over occurs at pachytene sub stage of prophase I of meiosis but visible at diplotene substage of prophase I.
• It helps in the mixing of characters and thus both parental and recombinant forms are produced.Each parent cell has sets of homologous chromosomes, one homolog from the dad and one from the mother.
• In meiosis, the maternal and fatherly chromosomes can be rearranged into the girl cells in a wide range of blends (in people there are 223 potential mixes). This ensures hereditary variety in explicitly reproducing living beings.
• So, the right answer is option c "crossing over"