A bivalent of meiosis I consists of

Four chromatids and two centromeres

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Two chromatids and one centromere

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Two chromatids and two centromeres

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Four chromatids and four centromeres

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Solution

The correct option is A Four chromatids and two centromeres
The two replicated homologous chromosomes associate to form a bivalent.
It is also known as tetrad and mainly formed during the pachytene stage of the meiosis.
It consists of a pair of homologous chromosome, each with 2 sister chromatids (total of 4 chromatids) attached with one centromere (total of 2 centromeres)
They undergo chiasmata formation for recombination.
So, the correct answer is option A.

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Similar questions

Question 6
A bivalent meiosis- I consists of
(a) two chromatids and one centromere
(b) two chromatids and two centromeres
(c) four chromatids and two centromeres
(d) four chromatids and four centromeres

Which of the following is correct about bivalent?

(i) Bivalents are tetrads.
(ii) A bivalent means 4 chromatids and 2 centromeres.
(iii) One bivalent consists of 2 homologous chromosomes.
(iv) Bivalents form in zygotene.

Q. Four chromatids and two centromeres which are homologous, occurs in

Q. A bivalent consists of ______ pair/pairs sister chromatid/chromatids and ______ pair/pairs of homologous chromosomes.

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