HOMEWORK HELP

Genetics as it applies to evolution, molecular biology, and medical aspects.

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sairakhan19
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HOMEWORK HELP

Post by sairakhan19 » Thu Dec 21, 2006 3:45 am

The so-called "blue" (really a characol gray). Andalusian chicken is produced by a cross between the black and white varities. Only a single pair of alleles is involved. What color chickens (and in what proportions) would you expect if you crossed two blues? If you crossed a blue and a black? explain.

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canalon
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Post by canalon » Thu Dec 21, 2006 9:09 am

Do your punnet square(s). It is easy. one set of alleles.
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Enzyme
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Re: HOMEWORK HELP

Post by Enzyme » Sat Dec 23, 2006 7:52 pm

sairakhan19 wrote:The so-called "blue" (really a characol gray). Andalusian chicken is produced by a cross between the black and white varities. Only a single pair of alleles is involved. What color chickens (and in what proportions) would you expect if you crossed two blues? If you crossed a blue and a black? explain.


sairakhan19, if the problem says that the Andalusian chicken (blue variety) is produced by a cross between the white variety and the black variety and that only a single pair of alleles is involved, don't you think that it could be a case of intermediate heredity?

AA - White
BB - Black
AB - Blue

Now, as canalon says, do the Punnet squares. They are very simple (there is only a set of two alleles).

I hope I've solved your doubt... ;)
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adamMV07
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Post by adamMV07 » Thu Jan 04, 2007 2:10 am

the "blue" chicken is a result of incomplete dominance...so the the heterozygote is a intermediate phenotype between the homozygous dominant and the homozygous recessive

blue= Aa
simple mendelian cross :D

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