Baldness Chromosome

baldness chromosome
Punnett gender influence baldness?

Baldness is a sex influenced trait. This means that although the allele of the gene for baldness is not carried by the sex chromosome X – is the expression of autosomal genes is determined by sex. In men, baldness is a dominant trait, while among women, is recessive. If a bald man whose father and mother had a hair of a woman marries and has a hair-haired father and mother who is bald, what are the genotypes of man his parents, wife and parents? What is the probability that this couple has a child as an adult bald? What is the probability of having a daughter who will go bald? Chance of a bald girl? probability bald?

B: normal (with hair) b: The bald man is dominant over b B (b> B) In females B is dominant to b (b>) the man had hair Parent B -> BB mothers had hair man -> BB Calvo man – woman Bb Father> hair – Bb mother woman> bald – bb> female hair -> BB P: bald (Bb) x Normal Female (Bb) F1: 1BB: 2BB: 1BB What is the probability of having a daughter who will go bald? 1 / 2 (sex) x 1 / 4 (baldness) = 1 / 8 chance of a bald girl? -> 1 / 4 (bb) the likelihood of a bat boy? -> 3.4 (+ 1/2Bb 1/4bb)


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October 17th, 2007 in Prevent Hair Loss | tags: , ,