Where do homologous chromosomes exchange genetic material through crossing over? a. centromeres b. centrosomes c. chiasma d. chlorophyll

C. Chiasma

Explanation:

Homologous chromosomes are a pair of chromosomes which are identical with respect to the location of the genes, the centromere, and length.

An individual inherits a pair of homologous chromosomes (one form each parent) and these chromosomes pair up during meiosis to exchange genetic material.

The site where this exchange occurs is called the chiasma, which is the point where the two chromosomes come in contact with each other and exchange the material. This is known as crossing over.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.