Fakhraee Attempt 1 Question 4 1 point A researcher is intere

Fakhraee: Attempt 1 Question 4 (1 point) A researcher is interested in genotypes in mice. He knows the following: the probability of a mouse having the genotype d/d is 1/2, the probability of a mouse having the genotype t/t is 1/4, and the probability of a mouse having the g/g genotype is 1/8. Using this information, the researcher can determine that the probability of a mouse having the genotype d/d t/t; g/g is C 1/8 (i e., 1/2 x 1/4) C 3/4 (ie., 1/2 x 1/4) 1/16 (i.e., 1/2 x 1/8) O 7/8 (i.e., 1/2 x 1/4 x 1/8) 1/64 (i.e., 1/2 x 1/4 x 1/8) Save Question 5 (1 point) How many phenotypes are expected when performing a cross involving 3 independent alleles (i.e., Ala.B/b.c/o x Ala.B/b.c/c) Save

Solution

Answer:

4) 1/64(i.e., ½*1/4 * 1/8)

d/d; t/t; g/g = ½ * ¼ * 1/8 = 1/64.

5). 8

Number of gametes is equal to number of phenotypes.

Each heterozygote produces 2 gametes. Each heterogametic triploid produces 8 gametes. So, 8 different phenotypes are produced from two heterogametic triploids.

6). 2/4

A/a x A/a

A/A-1/4

A/a = ½

a/a= ¼

A/A + a/a = ¼ + ¼ = 2/4