Question

define chiasmata please answer crazy boy
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Answer 1

Explanation:

a structure that forms between a pair of homologous chromosomes by crossover recombination and physically links the homologous chromosomes during meiosis.

Answer 2

HEYA, BUDDY !!

: $\implies$ The Chiasmata is the point of contact of non sister chromatids of homologous chromosomes. It is seen in the meiotic cell division. Meiosis involves division of sex chromosomes.

: $\implies$ In meiotic cell division, during prophase I Crossing occurs between non-sister chromatids of homologous chromosomes, which result in the exchange of genetic material. The point of contact is said to be chiasmata.

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★ As We know that, Significance of chiasmata:

- It is very essential to form during cell division because it helps in the attachment of chromosomes to opposite spindles.

- If chiasmata present it helps chromosomes to divide properly.

- The alignment will happen properly if there is chiasmata during metaphase I of the meiosis.

- If chromosomes fail to form, chiasma may result in disjoining and have chances to cause aneuploidy.

- The position of chiasma may determine genetically and sometimes they present along the length or at the near of the centromere is predetermined and single.

- If it’s single chiasma one can easily locate at the end of chromosome.

- Chiasma helps to preserve the lot of genetic material which does not undergo recombination.

- Each chiasma consists of two non-sister chromatid arms.

- Chiasmata which are close to the telomere is very unstable.

- A single chiasma can link the chromosomes together

- In research, it is said that in all 23 pairs of human chromosomes chiasma form.

know more, In meiosis of cytological favored chromosomes the distance between the chiasma can be measured. One should understand how it’s essential to form chiasma in order to prevent improper segregation.