Genetics Dihybrid Cross

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

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jtwin2
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Genetics Dihybrid Cross

Post by jtwin2 » Wed Jul 07, 2010 2:11 am

In an organism, two separate genes influence the length of the hair. The allele for long hair, L, dominates the allele for short hair, l. The allele for hair, H, dominates the hairless allele, h. In the cross between parents of genotype LlHh and llHh, what ratio of phenotypes would you expect to see?

LlHh x llHh----> LH, Lh, lH, lh x lH, lh, lH, lh


My answer:

3:3:2 ratio (3 long hair, 3 short hair, 2 no hair)

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JackBean
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Post by JackBean » Wed Jul 07, 2010 7:17 am

question is, how will look for example LLhh?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

jtwin2
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Post by jtwin2 » Thu Jul 08, 2010 1:46 am

LLhh would have no hair or long and hairless

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JackBean
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Post by JackBean » Thu Jul 08, 2010 7:02 am

that's the point, how can it have long hairs and be hairless at a time?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

jtwin2
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Post by jtwin2 » Thu Jul 08, 2010 8:23 pm

IDK...I GUESS IT'S JUST HAIRLESS

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jwalin
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Post by jwalin » Wed Jul 14, 2010 2:53 am

if i aint wrong and if i remember it correctly isnt it called epistasis. i.e. the expression of 1 gene is controlled by another.
it isn't what you do that matters but it is how you do it

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