Crossing over refers to: a) the random segregation of dyads in metaphase I of me

Question

Crossing over refers to:

a) the random segregation of dyads in metaphase I of meiosis. (Hint: The separation of dyads occurs during the first reductional meiotic division)

b) the formation of lateral elements between paired homologs during zygonema (Hint: This event describes the formation of the synaptonemal complex, which leads to crossing over of the paired homologs.)

c) the onset of homology search in the leptotene stage of meiosis I (Hint: this event precedes and is essential to the initial pairing of homologs during meiosis.)

d) genetic exchange between nonsister chromatids during meiosis. (Hint: Although the chiasmata observed during diplonema signal crossover events, the actual exchange of genetic material likely takes place during the preceding pachytene stage when homologs are most closely paired.)

*I know the answer is not B according to the teacher. Im terribly confused. I looked in my book and it speaks of crossing over as a "meiotic event that results in the genetic exchange between members of each homologous pair of chromosomes" but does not go into furter detail about the matter, so im not sure if this takes place between nonsister chromatids.

Explanation / Answer

ANSWER -d
d) genetic exchange between nonsister chromatids during meiosis. (Hint: Although the chiasmata observed during diplonema signal crossover events, the actual exchange of genetic material likely takes place during the preceding pachytene stage when homologs are most closely paired.)

genetic exchange between nonsister chromatids during meiosis results in variation through new combination and permutation of genes

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.