A Curly haired man marries a wavy haired woman.
What are the genotypes of the parents?
What is the probability of the couple having a child with curly hair?
The curly haired man is a geneticist. He is very upset when his wife has a straight hair child, why?
2006-07-18 07:53:14 · 2 answers · asked by iwishiwereanangel 3 in Science & Mathematics ➔ Biology
Assume curly is CC, wavy is CS and straight is SS.
parents genotypes must be CS (mother), CC (father) -- we know this because for the mother to produce a straight haired child with any father, she must be heterozygous to produce a CS phenotype.
the probability of the couple having a curly haired child is 50% -- parents are CC x CS, so a punnett square gives you CC, CS, CC, CS, so 2:4 or 1:2, or 50% of the children will be curly (CC).
the dad is pissed because the punnett square (from question #2) shows that a straight haired child is not possible from these two parents...in other words the momma cheated on the daddy...i guess we'll be seeing them on Maury : Paternity cases...
2006-07-18 08:03:44 · answer #1 · answered by Mandy 3 · 0⤊ 0⤋
Hair type is not determined by a single gene, so things are a bit more complicated than that. The same thing happens with skin tone...which as you may have noticed is nearly always a blend of ancestral shades.
2006-07-18 09:29:52 · answer #2 · answered by P. M 5 · 0⤊ 0⤋