Question 1

The P value is a quantitative expression of the probability that the results of another experiment of the same size and structure will deviate as much or more from expected results by chance.The greater the difference between observed and expected results of an experiment,

Accepted Answer

A)  the lower the χ2 value and the lower the P value.
B)  the greater the χ2 value and the greater the P value.
C)  the greater the χ2 value and the lower the P value.
D)  the lower the χ2 value and the greater the P value.
E)  the greater the χ2 value;but the P value is unaffected. C

Question 2

Humans have a gene,"T," that is involved in muscle formation of the tongue.Individuals with the one allele can roll their tongues,while individuals with the other allele cannot.If both parents can roll their tongues,but their child cannot,what can be said about the mode of inheritance?

Accepted Answer

A)  Tongue rolling is dominant.
B)  Tongue rolling is recessive.
C)  The parents were both homozygous,but the child was heterozygous.
D)  Tongue rolling is dominant,and both parents were heterozygous (Tt) .
E)  Tongue rolling is recessive,and both parents were heterozygous (Tt) . D

Question 3

If an affected individual is born to parents who are unaffected,what is the likely mode of inheritance?

Accepted Answer

autosomal recessive

Question 4

Describe the traits that make Pisum sativum an ideal organism for genetic studies.Why did Mendel ultimately decide not to include exterior seed coat color (gray vs.white)as one of the traits he analyzed?

Accepted Answer

The answer of Describe the traits that make Pisum sativum...

Question 5

In a test cross,a pure-breeding plant is crossed with a plant suspected to be heterozygous (Aa).What is the genotype of the pure-breeding plant?

Accepted Answer

The answer of In a test cross,a pure-breeding plant is...

Question 6

The P value is dependent on the number of ________,which is equal to the number of independent variables in an experiment.

Accepted Answer

The answer of The P value is dependent on the...

Question 7

Binomial expansion is a complex genetic calculation requiring repetition and precision in the use of the product rule and the sum rule.A shortcut called ________ eliminates the need for these repetitive calculations and can be used for any number of expansions between 0 and the nth power to yield the size of each possible class and the total number of classes possible.

Accepted Answer

The answer of Binomial expansion is a complex genetic calculation...

Question 8

What phenotypic ratio would you expect as a result of a test cross between a dihybrid organism and one that is homozygous recessive for alleles at two independent loci?

Accepted Answer

A)  3:1
B)  1:2:1
C)  1:1:1:1
D)  9:3:3:1
E)  9:4:2:1

Question 9

Crosses in which F₁ plants heterozygous for a given allele are crossed to generate a 3:1 phenotypic ratio in the F₂ generation are known as

Accepted Answer

A)  replicate crosses.
B)  reciprocal crosses.
C)  test crosses.
D)  monohybrid crosses.
E)  dihybrid crosses.

Question 10

In peas,the yellow allele is dominant over the green allele.If a plant with yellow peas is crossed to a plant with green peas,the resulting plants are 50% yellow and 50% green.What is the genotype of the parents in this cross?

Accepted Answer

A)  YY × yy
B)  YY × Yy
C)  Yy × yy
D)  Yy × Yy
E)  yy × yy

Question 11

Why did Mendel cut off the nascent anthers during the process of artificial cross-fertilization?

Accepted Answer

The answer of Why did Mendel cut off the nascent...

Question 12

What type of cross would be used to illustrate Mendel's law of independent assortment?

Accepted Answer

The answer of What type of cross would be used...

Question 13

What is the probability of rolling two six-sided dice and obtaining at least one 3?

Accepted Answer

The answer of What is the probability of rolling two...

Question 14

In peas,axial (A)flower position is dominant to terminal (a),tall (L)is dominant to short (l),and yellow (Y)is dominant to green (y).If a plant that is heterozygous for all three traits is allowed to self-fertilize,how many of the offspring would be dominant for all three traits?

Accepted Answer

A)  3/64
B)  9/64
C)  27/64
D)  32/64
E)  64/64

Question 15

What simple type of cross that looks at the inheritance of only one trait could be used to illustrate Mendel's law of segregation?

Accepted Answer

The answer of What simple type of cross that looks...

Question 16

A normal distribution curve contains all the possible experimental outcomes in graph form.The tall central segment of the curve represents the outcomes with the highest probability of occurrence.The average outcome,represented by the center of the data distribution,is known as what?

Accepted Answer

The answer of A normal distribution curve contains all the...

Question 17

In Guinea pigs,short hair (S)is dominant over long hair (s),rough coat (R)is dominant over smooth coat (r),and black hair (B)is dominant over white hair (b).List the possible gametes that can be produced by each of the individuals below.

Accepted Answer

The answer of In Guinea pigs,short hair (S)is dominant over...

Question 18

Assuming independent assortment,what phenotypic ratio would you expect to see if an individual with the genotype RrGg is self-crossed?

Accepted Answer

A)  1:3
B)  9:3:3:1
C)  1:2:1
D)  1:3:2:1
E)  3:1

Question 19

What is the probability of rolling one six-sided die and obtaining a 1 or a 2?

Accepted Answer

The answer of What is the probability of rolling one...

Question 20

In a cross between individuals who are both heterozygous (carriers)for a recessive disease such as albinism,you would like to determine the risk of one or more children to inherit the recessive phenotype.Which of the rules of probability can be used to calculate the probability of a particular combination of events that each have two alternative outcomes?

Accepted Answer

The answer of In a cross between individuals who are...

Exam 2: Transmission Genetics