Question

a diploid cell has 68 chromosomes.how many bivalents will be formed in this cell during meiosis 1​

Answer 1

There wil be 34 diploid cell formed in this cell during meiosis because if there are 10 bivalents formed in a cell with 20 chromosomes at the beginning of meiosis I.

Reason!

• Two haploid cells is formed as a result of the first meiotic division and Haploid means single set of chromosome.
• Meiosis I reduces the ploidy level from 2n to n (reduction) that's why Most of the differences between the processes occur during Meiosis I.
• (note :- Mitosis produces 2 diploid cells and meiosis produce 4 haploid cell )
• Errors during meiosis can lead to mutations in gametes.

Answer 2

34

There are 34 bivalents will be formed in this cell during meiosis 1​.

During meiosis I, a bivalent is a pair of homologous chromosomes that line up together. A bivalent is made up of two chromosomes, each containing a sister chromatid that has been duplicated.

Homologous chromosomes couple and form synapses during the prophase of meiosis I. Bivalents are chromosomes that are paired together. Each parent contributes one chromosome to the bivalent, which contains two chromosomes and four chromatids.

• The first meiotic division produces two haploid cells, where haploid refers to a single set of chromosomes.
• Most of the variations between the processes occur during Meiosis I, which reduces the ploidy level from 2n to n (reduction).

(Note: Mitosis creates two diploid cells, while meiosis creates four haploid cells.)

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