AP BIOLOGY

Detailed explanation-1: -What percentage of chromosomes are handed down by a sperm cell? A)75%.

Detailed explanation-2: -Sutton demonstrated that the number of chromosomes was reduced in spermatozoan cell division, a process referred to as reductive division. As a result of this process, each gamete that Sutton observed had one-half the genetic information of the original cell.

Detailed explanation-3: -Mitosis: Cell division in Asexual Reproduction. 2 Daughter cells exactly like the parent. Heredity is passed to offspring: 100% DNA from 1 parent.

Detailed explanation-4: -This is because our chromosomes exist in matching pairs – with one chromosome of each pair being inherited from each biological parent. Every cell in the human body contains 23 pairs of such chromosomes; our diploid number is therefore 46, our ‘haploid’ number 23. Of the 23 pairs, 22 are known as autosomes.