Antigens on red blood cells are hereditary traits that allow blood to be typed in different ways. one system is based on a gene with two alleles, m and n. if the frequency of the m allele in a population is 0.4, then according to the hardy-weinberg rule, the expected frequency of the heterozygous mn genotype is

Antigens on red blood cells are hereditary traits that allow blood to be typed in different ways. One system is based on a gene with two alleles, M and N. If the frequency of the M allele in a population is 0.4, then according to the Hardy-Weinberg rule, the expected frequency of the heterozygous MN genotype is 0.48.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.