- #1

foxyfresh

- 4

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I have the questions and book answer to these homework problem. The hard part for me is understanding WHY these answer turn out to be the way it is.

1: Hardy-weinberg:

## Homework Statement

14.4 Consider a population that, for unknown reasons, is not in Hardy-Weingberg equilibrium for some gene.

(a) can you calculate the genotype frequencies if you know the allele frequencies?

(b) can you calculate the allele frequencies if you know the genotype frequencies?

Answer:

(A) No.

(B) Yes.

## Homework Equations

So.. why is does it come out like this? Can you explain to me why these two answer are correct?

## The Attempt at a Solution

Because, I thought if H-W doesn’t applied, you cannot calculate either of this answer..right?

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Question 2:

1: Genetic Cloning/restriction enzyme

## Homework Statement

10.13: A haploid genome size of about 100 Mb. If this genome is digested with NotI (an eight-baed cutter), approximately how many DNA fragments would be produced? Assume equal and random frequencies of the four nucleotides.

Answer: 4^(8) = 65,526

So, every 65,526 based, the enzyme makes a cut. Thus, 100,000,000 bp / 65,526 bp = 1527 fragments.

## Homework Equations

so, why did you take the 4^8? how do you know to put "4" and put it to the 8th power? where is this formula even coming from?

## The Attempt at a Solution

I, actually, have no idea..

Because, I thought if H-W doesn’t applied, you cannot calculate either of this answer..right?

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Question 3:

## Homework Statement

10.6: You decide to clone your pet dog, which is brown with black spots. You take a few somatic cells from your dog and perform a somatic cell nuclear transfer procedure using an egg from a female dog that is black. In this procedure, the egg nucleus is removed and replaced with that from a somatic cell. What color fur will the puppy clone of your dog have?

Answer: brown with black spot.

## Homework Equations

so, why does the book answer come out to be this way? Also, is the oocyte a fertilized or unfertilized egg, right? Since, this procedure could only work with an unfertilized egg?

## The Attempt at a Solution

So.. my logic behind is this... So, is it b/c you have replaced the inner nucleus of the oocyte and replaced it with a somatic cell; thus, in turn, the oocyte will only expressed the somatic cell genotype ..which lead to the phenotype of brown with black spots. .. .

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Thank ahead,