Written Task 1 - Media and Mass Communication

Only available on StudyMode
  • Download(s) : 488
  • Published : June 8, 2012
Open Document
Text Preview
Hardy Weinberg Problems

Question 1

5 out of 300 starfish are born with green stripes. These green stripes show that the starfish can morph into other marine animal. Starfish are given this characteristic by a recessive allele.

* A) What is the frequency of the genotype of individuals in the population born with green stripes? * B) What is the frequency of the dominant allele?
* C) What is the frequency of the recessive allele?
* D) What is the frequency of the carriers in the population?

Question 2

9 out of 1800 leprechauns are born with brown hair, whereas the remaining 1791 leprechauns are born with normal ginger hair. These leprechauns with brown hair are given this characteristic by a recessive allele.

* A) What is the frequency of the genotype of the leprechauns in the population born with brown hair? * B) What is the frequency of the dominant allele?
* C) What is the frequency of the recessive allele?
* D) What is the frequency of the carriers in the population?

Question 3

A population of 100 ducks by a lake contains 37 ducks with pink and blue spots. The remaining ducks are yellow. The pink and blue spotted ducks are the product of a recessive allele.

* Calculate the percentage of heterozygous individuals in the population.

Question 4

3 million years ago amongst 400 bumble bees, there was a variation. There were 79 bumble bees that were striped red and blue. This was caused by a recessive allele.

* What is the frequency of the genotype of the bumble bees in the population born with red and blue stripes? (q²)

Question 5

In the future, it is predicted that 31 out of 50 horses will have pink eyes. This will be caused by a mutated recessive allele.

* What is the frequency of the recessive allele?

Answer Sheet

Question 1

A)q²= (5/300) x 100
= 0.0166 x 100
= 1.66%

B)p² = 1 - q²
= 1 – 0.0166
= 0.9834
P = √p²
=√0.9834
= 0.9916...
tracking img