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Biology 52 Online
OpenStudy (anonymous):

In guinea pigs, dark hair (D) is dominant over light hair (d) and curly hair (C) is dominant over smooth hair (c). Complete a dihybrid cross for parents with the genotypes: DdCc × DdCc and answer the following in complete sentences. Describe how you would set up a Punnett square for this cross. List the likelihood of each possible offspring genotype. List the likelihood of each possible offspring phenotype.

OpenStudy (anonymous):

if you copy and paste off yahoo ill know

OpenStudy (stephstar101):

http://bit.ly/PVqgcu That is the punnet square you want, just change the letters around. Genotypes are the "genes" of the offspring, while phenotypes are the "ph"ysical characteristics. Genotypes: DDCC (1/16) - Dark Curly DDCc (2/16) - Dark Curly DdCC (2/16) - Dark Curly DdCc (4/16) - Dark Curly DDcc (1/16) - Dark Smooth Ddcc (2/16) - Dark Smooth ddCC (1/16) - Light Curly ddCc (2/16) - Light Curly ddcc (1/16) - Light Smooth You can figure out the phenotypes, just add the fractions of the same physical features together.

OpenStudy (anonymous):

LOST!!!!

OpenStudy (stephstar101):

What do you mean? What you you confused about?

OpenStudy (anonymous):

how would you set up a punnet square

OpenStudy (stephstar101):

You know how to do quadratics in math, right? like ax^2+bx+c?

OpenStudy (anonymous):

no

OpenStudy (anonymous):

im in geomerty

OpenStudy (anonymous):

going into algebra 2

OpenStudy (anonymous):

im in 9th grade

OpenStudy (stephstar101):

hmmm... did you take algebra 1?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

but i barely passed same with geometry

OpenStudy (stephstar101):

there you go! :) it was in algebra one! they look like : \[x ^{2}+x+1\]

OpenStudy (stephstar101):

Well, I'll start explaining. If you look at the link I gave you, the top side and the left side have letters on them. These are the "possible combinations" that you're going to use.

OpenStudy (anonymous):

ok

OpenStudy (stephstar101):

How you get them is by starting with the DdCc. And we find our first value |dw:1342192810315:dw|

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