#22. Use the following information to answer the next three questions.
In rabbits, white fur colour (W) is dominant over black fur colour (w), and upright ears (U) are dominant over floppy ears (u).
A white rabbit with upright ears, heterozygous for both traits, mated with a homozygous white rabbit with floppy ears.
What are the possible phenotypes of the offspring?
Select one:
a. Black floppy and black upright
b. Black floppy and white upright
c. White floppy and white upright
d. White floppy and black upright
#23. A heterozygous white rabbit with floppy ears mated with a black rabbit with heterozygous upright ears.
What is the probability of having a black kit with upright or floppy ears?
Select one:
a. 0.50
b. 0.06
c. 0.13
d. 0.25
#24. Two white rabbits with upright ears, heterozygous for both traits, mated and produced offspring.
What is the probability the first offspring has black fur with upright ears and the second offspring has white fur with floppy ears?
Select one:
a. bevelled 3 over 128
b. bevelled 3 over 8
c. bevelled 9 over 256
d. bevelled 3 over 16
e. bevelled 1 over 16
#25.In Labrador retrievers, two genes work together to determine coat colour.The first gene affects the colour of the dark pigment, eumelanin. A genotype containing at least one dominant allele of this pigment gene results in black pigmentation (B_). A homozygous recessive genotype of this gene results in brown pigmentation.
The second gene affects whether the pigment eumelanin is present in the fur. If a dog has one dominant allele for this expression gene (E_), fur colouration is determined by the pigment gene. If a dog is homozygous recessive for the extension trait, the dog will have a yellow coat.
Description Genotype(s)
Black coat BBEE / BbEE / BBEe / BbEe
Chocolate coat bbEE / bbEe
Yellow coat BBee / Bbee / bbee
What percentage of chocolate labs would be produced from the mating of a yellow lab who is homozygous recessive for both genes to a black lab who is heterozygous for both coat colour and expression?
Select one:
a. 75%
b. 25%
c. 33%
d. 50%
#26. A male and female have three children, all girls. The couple is expecting their fourth child. The probability their fourth child will be female is __i__, and the probability the couple will have four female children is __ii_.
The row that indicates the correct probabilities is
Select one:
a.i ii
1 fourth 1 over 8
b.i ii
3 over 4 1 fourth
c.i ii
1 half 1 over 16
d.i ii
1 over 16 1 fourth
These are all the questions i have at the moment if i have more i will post them on Thursday. Please try to get back with me tomorrow with these questions because i need to hand in my assignment on Thursday morning. Thank you for your help and have a good evening
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