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Home Q & A Board Science-Related Homework Help High School Level Science
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MikeLake MikeLake
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11 years ago
pedigree chart.....
(colored square)-----(colored circle)
below= 2 squares and 2 colored circles...

is it
a. autosomal recessive
b. autosomal dominant
c. X-linked recessive
d. X-linked dominant
e. Y-linked trait?

*I'm not sure can there be more than one answer......but if there is can u please give the genotypes of the parents...for every correct answer
p.s. I'll give best answer to the "best" answer.....
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wrote...
#1
11 years ago
X-linked recessive


P .......  XR Xr     x     XR  Y

F1 ........ XR XR,  XR XY,  Xr XR,  Xr Y

The female offspring (circles) will all have the dominant trait because they all get XR from the male parent.

The male offspring (squares) have a 50% chance of having the dominant trait and a 50% chance of having the recessive trait.  So it's quite likely that both of the male offspring got the recessive trait by inheriting the Xr from the female parent.


With this small sample size, it could also be autosomal dominant.
P   Rr   x   Rr

F1  3 dominant trait: 1 recessive trait

It's not unreasonable to get the offspring shown in the pedigree from this cross.
Answer accepted by topic starter
rjt6250rjt6250
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#2
Posts: 110
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11 years ago
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