In Drosophila melanogaster males, homologous chromosomes pair and segr

1.	In Drosophila melanogaster males, homologous chromosomes pair and segregate during meiosis but crossing over does not occur. At which stage of meiosis does segregation of 2 alleles of a gene take place in their individuals?(a) Zygotene(b) Diakinesis(c) Anaphase-I(d) Anaphase-II
Answer» Answer is : (c) Anaphase-I During anaphase-I, no crossing over leads to segregation of alleles. Anaphase-I begins when the two chromosomes of each bivalent (tetrad) separate and start moving toward opposite poles of the cell as a result of the action of the spindle, but their centromeres are still attached.

In Drosophila melanogaster males, homologous chromosomes pair and segregate during meiosis but crossing over does not occur. At which stage of meiosis does segregation of 2 alleles of a gene take place in their individuals?(a) Zygotene(b) Diakinesis(c) Anaphase-I(d) Anaphase-II

Answer»

Answer is : (c) Anaphase-I

During anaphase-I, no crossing over leads to segregation of alleles. Anaphase-I begins when the two chromosomes of each bivalent (tetrad) separate and start moving toward opposite poles of the cell as a result of the action of the spindle, but their centromeres are still attached.

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In Drosophila melanogaster males, homologous chromosomes pair and segregate during meiosis but crossing over does not occur. At which stage of meiosis does segregation of 2 alleles of a gene take place in their individuals?(a) Zygotene(b) Diakinesis(c) Anaphase-I(d) Anaphase-II

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