Cross-like configurations when non-sister chromatids of a bivalent come in contact during the first meiotic division are

Chiasmata

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Bivalents

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Chromomeres

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Centromeres

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Solution

The correct option is A
Chiasmata

Chiasma is the point where two homologous non-sister chromatids exchange genetic material during chromosomal crossover which occurs during meiosis. The chiasmata become visible during the diplotene stage of prophase I of meiosis. However, crossing over of genetic material occurs during the pachytene stage.

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Similar questions

Q. Cross-like configurations, when non-sister chromatids of a bivalent come in contact during first meiotic division are

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. 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.

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

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