Breakage, exchange and rejoining of homologous chromosomal segments.

Pairing of homologous chromosomes

A pair of homologous chromosomes

Separation of homologous chromosomes.

Homologous compounds have:

Assertion: Crossing over leads to recombination of genetic material on the two chromosomes. Reason: Crossing over is the exchange of genetic material between two homologous chromosomes.

In which phase of meiosis homologous chromosomes seperates?

The members of a homologous pair of chromosomes

Four different steps that occur during meiosis are given in the following list. (i) Complete separation of chromatids (ii) Pairing of homologous chromosomes (iii) Lining up of paired chromosomes on equator (iv) Crossing over between chromatids Select the correct sequential arrangement of the steps.

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.

Which term is applied for exchange of chromosomal segments between non-homologous chromosomes ?