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Biology Mendelian Genetics (repost)

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Important notice: you are required to show work on any given assignment or exam problem

1)Problems involving one Gene
I)In cats, long hair is recessive to short hair.A true-breeding (Homozygous) short-haired male is mated to a long- haired female. What will there kittens look like?
II)Two cats are mated. One of the parent cats is long-haired (recessive allele).The litter which results contains two short -haired and three long- haired What does the second parent lookl like, and what is its genotype?

2) Problems involving two genes:
In garden peas, long stems are dominant to short stems, and yellow seeds are dominant to green seeds. 100 long/yellow pea plants, all of which had one short/green parent, are interbred (bred to each other). 1600 pregnant result. Please answer the following questions about these progeny.
I) Assuming that these two genes are unlinked, about how many long/green pea plants would you expect to find among the offspring?
II)What ratio of yellow to green seed color would you expectamong the offspring?
III)What would you expect the overall phenotypic ratio among the 1600 offspring to be (taking to consideration both traits?)

*Please explain your answers. Thanks!
** This is a repost because I had posted this on a wrong section :X sorry basil!

December 12, 2010

2 Comments • Newest first

pspjia

I need help setting up a punnett square...

Reply December 12, 2010
Belloman

Make a Punnett Square, all your problems will be solved.

Reply December 12, 2010