AP BIOLOGY

Detailed explanation-1: -Expert-Verified Answer. The sequences represents chromosome number during fertilization of sperm and egg is n+n->2n and Sperm and egg are haploid, but fertilized egg is diploid.

Detailed explanation-2: -In presenting chromosome numbers or karyotype constitutions, the letter x refers to the basic chromosome number in a polyploid ‘series’, while 2n, the diploid chromosome number, refers to the number of chromosomes in a cell of the sporophyte (the individual normally producing the germ cells).

Detailed explanation-3: -Humans have 46 chromosomes in each diploid cell. Among those, there are two sex-determining chromosomes, and 22 pairs of autosomal, or non-sex, chromosomes. The total number of chromosomes in diploid cells is described as 2n, which is twice the number of chromosomes in a haploid cell (n).

Detailed explanation-4: -For example, humans are diploid (2n) and have 46 chromosomes in their normal body cells. These 46 chromosomes are organized into 23 pairs: 22 pairs of autosomes and 1 pair of sex chromosomes.