Group+1-GECHS

=Punnett Square Creation and Predictions=

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Group Number: WON

Male Genotype: BO Male Blood Type: B

Female Genotype: AB Female Blood Type: AB

I. Complete the Punnett Square below after you are given your random mating:
__**(B)**__ ||= __**Copy 2 - Male**__ __**(O)**__ || __**(A)**__ ||= (AB) ||= (AO) || __**(B)**__ ||= (BB) ||= (BO) ||
 * = X ||= __**Copy 1 - Male**__
 * = __**Copy 1 - Female**__
 * = __**Copy 2 - Female**__

1.) What are the possible blood types of the offspring from these parents? Explain. AB, A, B - the recessive O in the female genotype allows for the expression of the dominant genes in 2 of the four potential offspring.

2.) What are the probabilities of each of these blood types? Explain. A: 25 B: 50 AB: 25 Recessive O would not be expressed in the two offspring on the right of the Punnett Square.

II. Going a step further:
In humans there is a gene which controls gender. There are two alleles, X and Y. Males have are XY. Females are XX. Create a punnet square for a male and a female and complete it.

__**(X)**__ ||= __**Copy 2 - Male**__ __**(Y)**__ || __**(X)**__ ||= (XX) ||= (XY) || __**(X)**__ ||= (XX) ||= (XY) ||
 * = X ||= __**Copy 1 - Male**__
 * = __**Copy 1 - Female**__
 * = __**Copy 2 - Female**__

1.) What are the probabilities (in percent) of the offspring being male or female? Explain. 50: 50 The male sends out the Y chromosome to 2 of the four squares.

III. Going even further:
a. Create your own scenario like the one above regarding blood type in humans. Enter the scenario below. b. Create three questions based upon your scenario. Enter the questions below. c. Make sure that you have checked the questions over such that you can figure out the answers!!!

Scenario: brown eyes are dominant over green eyes. If a woman with green eyes mates with a male with one brown and one green eye color, what is the percentage of their offspring that will have green eyes?

Questions: It would appear there would be a 50-50 percent chance of having an offspring with green eyes.

IV. Going even further, further:
A man with blood genotype AO (Blood Type A) and a woman with genotype AB (Blood Type AB) marry and have three children.

1.) What is the percentage chance that an offspring will have blood type A? Explain. 50% - these are independent events.

2.) What is the percentage chance that an offspring will be a female? Explain. 50% - Y chromosome delivery is still a 50% prospect on this independent event.

3.) BONUS 1>>>> What is the percentage chance that the offspring will be a female with blood type A? Explain. 50% -

4.) BONUS 2>>>> What is the percentage chance that the offspring will be a male with blood type B? Explain.