Human Genetics.

Question

What is the human MN blood group phenotype ratio of progeny from the following mating?

LM LM x LM LN

Answer 1

L^M and L^N  are co-dominant alleles. The L^ML^M person will only make L^M gametes so it is 1/1. The L^M L^N person can make either L^M or L^N so the probability of making L^M gametes is 1/2. To calculate: 1/1 x 1/2= 1/2 so the probability is 50%.

Ramona