A bivalent of meiosis I consists of

Two chromatids and one centromere.

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Four chromatids and two centromeres.

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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 B Four chromatids and two centromeres.
Each bivalent has two chromosomes and four chromatids, with one chromosome coming from each parent. Each homologous pair of chromosomes shows four chromatids, of which sister chromatids are attached by a centromere. Thus, each bivalent includes two centromeres.

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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

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

Q. Which of the following statements hold true for bivalents?
(i) Generally a bivalent is an association of four chromatids and two centromere.
(ii) It is a homologous chromosome.
(iii) Crossing over occurs between two different kinds of bivalents.

Q. In the Metaphase stage of Mitosis, each chromosome consists of _____ chromatid (s), _______ centromere(s), _______kinetochore(s) and ______ unit(s) of DNA .

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.

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