2) XX
3) XY
4) X
5) 22
6) 23, you have 46 total chromosomes
7) true?
8) autosomal chromosome
9) I don't understand this one i'm sorry
False we have three layers of skin.
Answer: Local chemical conditions
Explanation: A Precapillary Sphincter is a smooth muscle that is located in circles around the capillaries.
The precapillary sphincter helps to coordinate blood flow to the into the capillaries by causing the capillaries to decrease the flow of blood to tissues that are dormant or not active.
Alleles. An allele is a variant form of a gene.