PLEASE HELP! -Genotypic & Phenotypic Ratios...

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LiL Homie
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PLEASE HELP! -Genotypic & Phenotypic Ratios...

Post by LiL Homie » Mon Nov 27, 2006 7:58 pm

Describe the genotypic and phenotypic ratios for each of the following (assume the parental generations are true breeding when not stated otherwise):

a)The F2 of monohybrid cross with full dominance.

b)The F2 of monohybrid cross with incomplete dominance.

c)The F2 of a monohybrid cross with codominance.

d)The F2 of a dihybrid cross with full dominance at each genetic locus and no interactions between alleles at the two loci (independent assortment).

e)The F2 of a dihybrid cross with incomplete dominance at both loci and no interactions between alleles at the two loci (independent assortment).

f)The F2 of a dihybrid cross with codominance at both loci and no interactions between alleles at the two loci. (independent assortment).
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I know it's a lot, but I just don't understand how to even start this or what letters I'm supposed to use to make the crosses.I just keep confusing myself!
Can someone please try to help explain these to me! I would really appreciate it, Thank you! :)

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canalon
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Post by canalon » Mon Nov 27, 2006 9:34 pm

Punnet squares are your friend.
Patrick

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)

Dr. Genius
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Post by Dr. Genius » Mon Dec 11, 2006 5:55 pm

Yeah, Punnet squares make it much easier =)

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