Biology questions about genotype, phenotype, offsprings....etc. PART III?

Question

10. If the parents of a child have the following genotypes [Bb x Bb], what is the probability that they will have a child with the genotype [Bb]?

A) 100%

B) 50%

C) 25%

D) 0%

11. When the two alleles P1P2 are the genotype of an individual, that person displays features of both alleles. This is known as

A) polygenic inheritance.

B) Multiple alleles.

C) complete recessiveness.

D) lack of dominance.

12. "This patient with Marfan syndrome has really long fingers and toes, and is exceptionally tall." This is a statement describing

A) genotype.

B) phenotype.

C) monohybridization.

D) locus placement.

13. Black fur in mice (B) is dominant to brown fur (b) Short tails (T) are dominant to long tails (t). What fraction of the progeny of the cross BbTt BBtt will have black fur and long tails?

a. 1/16

b. 3/16

c. 3/8

d. 1/2

e. 9/16

Answer 1

10. B

11. B

12. B

Answer 2

10)B

11)D

12)B

13)D (because it will definitely have black fur n the chance of havin long tails is 50 %)

Answer 3

10. B

11. D or codominance.

12. B

13. Answer = 50%.--BbTt x BBtt gives gametes BT,Bt,bT,bt x Bt --->BBTt,BBtt,BbTt & Bbtt.  Black fur & long tails = Bbtt and BBtt (50%).