Question

What do you mean by synapsis and crossing over?

Answer 1

Answer:

Crossing over is an interchange or reciprocal exchange of segment between chromatids of a homologous pair of chromosomes resulting in a recombination of gene.The term crossing over was coined by Morgan 1990. Synapsis is the pairing of two homologous chromosomes that occur during meiosis.

Explanation:

Answer 2

Explanation:

Synapsis (also called syndesis) is the pairing of two chromosomes that occurs during meiosis. ... Sex chromosomes also undergo synapsis; however, the synaptonemal protein complex that holds the homologous chromosomes together is only present at one end of each sex chromosome.