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Autosomal Gene
Linkage
30. A cross is performed between two organisms with the genotypes
AaBb and aabb. What genotypes in the offspring are the result
of recombination?
A. Aabb, AaBb
B. AaBb, aabb
C. aabb, Aabb
D. Aabb, aaBb
30. Genes P, Q, R and S are located on the same chromosome. The cross over
values between them are:
P-Q 20%
P-R 30%
P-S 15%
Q-R 15%
Q-S 30%
R-S 40%
What is the sequence of genes in the gene map of the chromosome?
A.
B.
C.
D.
S, P, Q, R
R, P, Q, S
P, R, S, Q
Q, S, R, P
28. The chi-squared statistical test is often used in genetics. What can
geneticists do using this test?
a) Find out whether the results of a genetic cross test are
significantly different from the expected ratio
b)
Calculate the expected numbers of offspring of each
phenotype in a genetic cross
c)
Find out the probability of an error in a genetic cross
d)
Calculate the degrees of freedom in a genetic cross
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