When a cell is in metaphase I- it consists of bivalents withtwo chromatids and one centromeretwo chromatids and two centromeresfour chromatids and two centromeresfour chromatids and four centromeres

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Zygotene

When a cell i...

Question

When a cell is in metaphase I, it consists of bivalents with

two chromatids and one centromere

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two chromatids and two centromeres

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four chromatids and two centromeres

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four chromatids and four centromeres

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Solution

The correct option is C four chromatids and two centromeres
During Meiosis I, the homologous chromosomes pair during synapsis. They form "bivalent" or "tetrad".

Bivalent refers to the pair of homologous chromosomes. Generally, a chromosome has 1 centromere. So, there are 2 centromeres in a bivalent.

Tetrad refers to the 4 chromatids or 2 sets of 2 sister chromatids that are present.

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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. 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.

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.

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