Sunday, January 22, 2012

Genetic Problem?

I am having some real difficulty with the last problem in my homework on this question.... In four-o ' clock plants the allele for the red flower colour has an efffect that is incompletly dominant over the effect of the white colour allele, If a cross between two plants produced 8 red, 32 pink and 5 white plants what are the phenotypes of the parents? Please help I tried going to an online tutor but the chat was closed :(

Genetic Problem?
let R = red

little r = white

Rr = pink



8 Red = RR

32 Pink = Rr

5 White = rr



because all the 3 different types of alleles show up, both parents have to be pink (ie. Rr)



Punnett Square of Parents:



R r



R RR Rr

r Rr rr



1 RED: 2 PINK: 1 WHITE


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