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Exam 3: Mendelism The Basic Principles Of Inheritance

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Question 21

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A dominant trait is one that:

A) Will always be expressed if it is present in the genotype
B) Is not observed in every generation if it is present in the genotype
C) Masked by a recessive trait, if a recessive trait is present in the genotype
D) All of these
E) None of these

F) C) and D)
G) B) and D)

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Question 22

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An organism's allelic constitution is also known as its:

A) Phenotype
B) Mosaic nature
C) Genotype
D) Genetic code
E) Appearance

F) C) and D)
G) A) and E)

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Question 23

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Black fur in mice is dominant to brown fur.Short tails is dominant to long tails.What proportion of the offspring from a cross between an individual with the genotype BbTt and BBtt will have black fur and long tails?

In a cross between individuals of the genotype AaBbCc x AaBbCc,what is the probability of producing the genotype AABBCC?

The degrees of freedom associated with a Chi-Square test is equal to:

The physical appearance of an organism is known as its:

A heritable factor that exists in two forms is also known as a(n) :

Albinism is caused by a recessive autosomal allele.A man and woman,both normally pigmented,have an albino child together.The mother is now pregnant for a third time and her doctor tells her she is having fraternal twins.What is the probability that both children will have normal pigmentation?

The principle of segregation states that:

Which of the following is a method for analyzing a cross involving 2 genes?

Flower position,stem length,and seed shape were three traits that were studied by Mendel.Each is controlled by an independently assorting gene.If a plant that is heterozygous for all three traits was allowed to self-fertilize,what proportion of the offspring would be expected to show all three dominant phenotypes?

In a monohybrid cross,if the P generation consists of plants that are true breeding (one is homozygous dominant,the other homozygous recessive) then the F2 generation will consist of organisms that exhibit what ratio of homozygous dominant individuals to heterozygous individuals to homozygous recessive individuals?

In a pedigree analysis which of the following would represent an affected male?

Two parents who are not affected by cystic fibrosis have a child who is affected.Assuming that cystic fibrosis is controlled by one gene,what is the probability that their next three children will also be affected by cystic fibrosis?

Why has progress studying the genetic traits of human beings been slow?

In sesame,the one-pod condition (P)is dominant to the three-pod condition (p),and normal leaf (L)is dominant over wrinkled leaf (l).The two characters are inherited independently.A cross between two members of the F1 generation produces the following progeny: 318 one-pod normal,185 one-pod wrinkled,323 three-pod normal and 184 three-pod wrinkled.Determine,using chi-square analysis whether the data fits the typical 9:3:3:1 ratio.Show your work

Curly hair is caused by a dominant gene in humans.This trait is rare among northern Europeans.If a curly-haired northern European marries a person with straight hair,what proportion of their offspring would be expected to have curly hair,if the curly haired individual was a heterozygote?

An organism that inherits two identical alleles,one from its mother and one from its father is known as a(n)

An organism that inherits two different alleles for a single trait,one from its mother and one from its father is known as a(n) :

The chi-square statistic is calculated as: