posted by Freddo on .
Can anyone comment as to wether this solution is correct for this question please !!
Draw a mating diagram where L is the dominant gene for the digestion of lactose and shows the crosses between two heterozygotes and wiht the the phenotypic and genotypic ratio of the offspring in the F1 generation.
I also need to know the phenotypic prportions of the offspring of another cross between a person with lactose intolerance and one who is heterozyous.
Heterozygote (both male and female) Lactose tolerant
Male L l gametes
L l gametes
3:1 Tolerant/Intolerant - Phenotypic
1:2:1 LL/Ll/ll - Genotypic
1:3 Tolerant/Intolerant - Phenotypic
1:3 Ll/ll - Genotypic
Can't help with the diagram. Google: "punnit square definition"