During the pachytene stage in crossing over, the exchange of genetic material occurs between
Two non-homologous chromosomes
Two homologous chromosomes
Non-sister chromatids of non-homologous chromosomes
Sister chromatids of non-homologous chromosomes
A
Two non-homologous chromosomes
B
Two homologous chromosomes
C
Sister chromatids of non-homologous chromosomes
D
Non-sister chromatids of non-homologous chromosomes
Open in App
Solution
Verified by Toppr
Pachytene is the third stage of prophase 1 of meiosis.
During this stage, each chromosome pair separates into sister chromatids and crossing over of genes occurs.
Crossing over is also called synapsis and is is one of the final stages of genetic recombination.
It is the process of exchange of genetic materials or segments between non-sister chromatids of homologous chromosomes.
So, the correct answer is 'Two homologous chromosomes'.
Was this answer helpful?
1
Similar Questions
Q1
Exchange of segments between non-sister chromatids of homologous chromosomes is
View Solution
Q2
Question 4 During Anaphase - I of meiosis (a) homologous chromosomes separate (b) non-homologous autosomes separate (c) sister chromatids separate (d) non-sister chromatids separate
View Solution
Q3
Assertion :Events in pachytene play a key role in evolutionary changes in organisms. Reason: Exchange of genetic material takes place between sister chromatids of homologous chromosomes.
View Solution
Q4
Assertion: Mitosis is known as equational division and meiosis is known as reduction division.
Reason: During meiosis, the non-sister chromatids of homologous chromosomes cross-over and exchange genetic information. This step does not occur during mitosis.
View Solution
Q5
Assertion (A): Events in pachytene play a key role in evolutionary changes in organisms Reason (R): Exchange of genetic material takes place between sister chromatids of homologous chromosomes