6) One of Mendels Laws says that the probability of inheriting a maternal allele

Question

6) One of Mendels Laws says that the probability of inheriting a maternal allele for a gene does not affect the probability of inheriting the maternal allele for another gene (you should be worried if you cannot immediately identify this law). If each gene has two alleles, what is the probability that one individual inherited the paternal allele at three different genes? Report as a proportion, not percentage, e.g., 0.1, NOT 10%.

7) In cats, black fur is dominant over cinnamon fur. If two heterozygous cats have a litter of three kittens, what is the probability that all three will have cinnamon fur?

Report as a proportion, not percentage, e.g., 0.1, NOT 10%.

8) Sometimes there can be more than one desirable gene. You are going to give two plants of your favorite tomato variety to a friend, and you want both of them to have the desirable allele at each of two genes. At gene one, you know the parents are both heterozygotes; at gene two, the mother is heterozygous and the father is homozygous for the desirable allele. What is the probability of any given seed being heterozygous for both genes? Report as a proportion, not percentage, e.g., 0.1, NOT 10%.

9) The EGLN1 gene helps regulate body oxygen levels. One allele H is dominant over h, and helps increase fitness at high altitude (where oxygen is low). In a study of families in Tibet, researchers found 422 HH individuals, 377 Hh, and 201 hh individuals. The study showed that infant mortality was lower in Hh individuals than hh, and lowest in HH individuals.

Is the Tibetan population in Hardy Weinberg Equilibrium at this H/h gene?

10) While most commercial hens lay white eggs, certain Chinese and Chilean hens lay blue-green eggs. It is the result of an insertion mutation that causes blue eggshell pigment to be inherited as a dominant (B) allele (this was discovered by Punnett himself). In a flock of hens, there were 70 birds laying blue eggs and 30 laying white eggs.
What is the genotype frequency for the recessive (b) form? If it is impossible to tell, enter 0. Report as a proportion, not percentage, e.g., 0.1, NOT 10%.

Explanation / Answer

(6)Based on Mendel’ law, the alleles of two heterozygous gene pairs will follow independent assortment and will ½ chance to get inherited to the child. So the probability that one individual inherit the paternal allele at three different genes is 2/2x1/2x1/2=1/8=0.125.

Related Questions

Navigate

• Browse (All)
• Browse 6
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.