Question 1

-This figure shows a human pedigree.Based on the information presented in this figure,what type of disorder would this be?

Accepted Answer

A) autosomal dominant 
B) incomplete dominance 
C) due to multiple alleles 
D) autosomal recessive 
E) codominant 
A) autosomal dominant 
B) incomplete dominance 
C) due to multiple alleles 
D) autosomal recessive 
E) codominant D

Question 2

Individuals who are heterozygous for the sickle-cell disease have an increased resistance to the protozoan which causes malaria.

Accepted Answer

A) True 
 B)False  True

Question 3

In humans,brown eyes (B)are dominant over blue eyes (b).A brown-eyed woman who has a blue-eyed child would have the genotype

Accepted Answer

A) Bb. 
B) BBB. 
C) BbBb. 
D) bb. 
E) BB. 
A) Bb. 
B) BBB. 
C) BbBb. 
D) bb. 
E) BB. A

Question 4

What are alleles?

Accepted Answer

A) genes for different traits,such as hair color and eye color 
B) dominant forms of a kind of characteristic carried by genes 
C) recessive forms of a kind of characteristic carried by genes 
D) locations of genes on chromosomes 
E) alternative forms of a gene for a single trait,such as blue eyes and brown eyes 
A) genes for different traits,such as hair color and eye color 
B) dominant forms of a kind of characteristic carried by genes 
C) recessive forms of a kind of characteristic carried by genes 
D) locations of genes on chromosomes 
E) alternative forms of a gene for a single trait,such as blue eyes and brown eyes

Question 5

If a biologist wanted to manually cross-fertilize two pea plants,which of the following steps must be taken?

Accepted Answer

A) transfer pollen from one plant to the other 
B) transfer a pea from one plant to the other 
C) transfer the egg from one plant to the other 
D) transfer the stigma from one plant to the other 
E) transfer the ovule from one plant to the other 
A) transfer pollen from one plant to the other 
B) transfer a pea from one plant to the other 
C) transfer the egg from one plant to the other 
D) transfer the stigma from one plant to the other 
E) transfer the ovule from one plant to the other

Question 6

If your mother is homozygous recessive and your father is heterozygous for the autosomal dominant Huntington disease,what are your chances of escaping the disease?

Accepted Answer

A) 0% 
B) 25% 
C) 50% 
D) 100% 
E) 75% 
A) 0% 
B) 25% 
C) 50% 
D) 100% 
E) 75%

Question 7

Which of the following disorders is characterized by thick,viscous mucus production in the lungs and digestive tract?

Accepted Answer

A) Sickle-cell disease 
B) Huntington disease 
C) Tay-Sachs disease 
D) PKU 
E) Cystic fibrosis 
A) Sickle-cell disease 
B) Huntington disease 
C) Tay-Sachs disease 
D) PKU 
E) Cystic fibrosis

Question 8

Which of the following disorders is characterized by benign tumors made up of nerve cells and may include skeletal deformities?

Accepted Answer

A) PKU 
B) Huntington disease 
C) Tay-Sachs disease 
D) Neurofibromatosis 
E) Achondroplasia 
A) PKU 
B) Huntington disease 
C) Tay-Sachs disease 
D) Neurofibromatosis 
E) Achondroplasia

Question 9

In humans,brown eyes (B)are dominant over blue eyes (b).If a homozygous brown-eyed woman mates with a homozygous blue-eyed man,what would be the chances of producing a blue-eyed child?

Accepted Answer

A) 100% 
B) 50% 
C) 0% 
D) 25% 
E) 75% 
A) 100% 
B) 50% 
C) 0% 
D) 25% 
E) 75%

Question 10

In which kind of cross would you expect to find a ratio of 3:1 among the F2 offspring?

Accepted Answer

A) monohybrid cross 
B) genotypic cross 
C) phenotypic cross 
D) test cross 
E) dihybrid cross 
A) monohybrid cross 
B) genotypic cross 
C) phenotypic cross 
D) test cross 
E) dihybrid cross

Question 11

Assume freckles and dimples are dominant traits.Two individuals with freckles and dimples have a child with no freckles and no dimples.What are the genotypes of the parents?

Accepted Answer

A) Fd Fd x Fd Fd 
B) Ff dd x FF DD 
C) Ff Dd x Ff Dd 
D) Ff dd x ff dd 
E) FF DD x ff dd 
A) Fd Fd x Fd Fd 
B) Ff dd x FF DD 
C) Ff Dd x Ff Dd 
D) Ff dd x ff dd 
E) FF DD x ff dd

Question 12

If you were studying the phenomena of one gene having more than one effect,you would be studying which of the following?

Accepted Answer

A) gene linkage 
B) codominance 
C) incomplete dominance 
D) genotype dominance 
E) pleiotropy 
A) gene linkage 
B) codominance 
C) incomplete dominance 
D) genotype dominance 
E) pleiotropy

Question 13

What is a trait that is controlled by a combination of genes plus environmental influences?

Accepted Answer

A) a polygenic phenomenon 
B) a mutifactorial trait. 
C) a polygenic trait 
D) a phenotypic trait. 
E) a codominant trait. 
A) a polygenic phenomenon 
B) a mutifactorial trait. 
C) a polygenic trait 
D) a phenotypic trait. 
E) a codominant trait.

Question 14

Which of the following terms would be used for an allele which can mask the expression of another allele?

Accepted Answer

A) phenotype 
B) locus 
C) dominant 
D) recessive 
E) genotype 
A) phenotype 
B) locus 
C) dominant 
D) recessive 
E) genotype

Question 15

-This figure shows a human pedigree with two females (in third generation)with breast cancer.What is the genotype of their father?

Accepted Answer

A) could be either homozygous recessive or heterozygous 
B) heterozygous 
C) homozygous dominant 
D) homozygous recessive 
E) could be either homozygous dominant or heterozygous 
A) could be either homozygous recessive or heterozygous 
B) heterozygous 
C) homozygous dominant 
D) homozygous recessive 
E) could be either homozygous dominant or heterozygous

Question 16

This figure shows a human pedigree.Based on the information presented in this figure,what type of disorder would this be?

Accepted Answer

A) due to multiple alleles 
B) codominant 
C) autosomal recessive 
D) autosomal dominant 
E) incomplete dominance 
A) due to multiple alleles 
B) codominant 
C) autosomal recessive 
D) autosomal dominant 
E) incomplete dominance

Question 17

In a Mendelian monohybrid cross,which generation is always completely heterozygous.

Accepted Answer

A) F3 
B) P 
C) F2 
D) P2 
E) F1 
A) F3 
B) P 
C) F2 
D) P2 
E) F1

Question 18

The four o'clock flower is an example of incomplete dominance.R = red,r = white,and Rr = pink.If two hybrids are crossed,what are the chances that an offspring will have pink flowers?

Accepted Answer

A) 0% 
B) 25% 
C) 75% 
D) 100% 
E) 50% 
A) 0% 
B) 25% 
C) 75% 
D) 100% 
E) 50%

Question 19

When an organism has two identical alleles for a trait we would refer to this condition as:

Accepted Answer

A) phenotype 
B) genotype 
C) homozygous 
D) gene locus 
E) heterozygous 
A) phenotype 
B) genotype 
C) homozygous 
D) gene locus 
E) heterozygous

Question 20

In a recessive disorder,individuals who have that recessive allele but not the disorder are referred to as

Accepted Answer

A) autosomal 
B) codominant 
C) phenotypes 
D) genotypes 
E) carriers 
A) autosomal 
B) codominant 
C) phenotypes 
D) genotypes 
E) carriers

Exam 10: Patterns of Genetic Inheritance

-This figure shows a human pedigree.Based on the information presented in this figure,what type of disorder would this be?

Individuals who are heterozygous for the sickle-cell disease have an increased resistance to the protozoan which causes malaria.

In humans,brown eyes (B)are dominant over blue eyes (b).A brown-eyed woman who has a blue-eyed child would have the genotype

What are alleles?

If a biologist wanted to manually cross-fertilize two pea plants,which of the following steps must be taken?

If your mother is homozygous recessive and your father is heterozygous for the autosomal dominant Huntington disease,what are your chances of escaping the disease?

Which of the following disorders is characterized by thick,viscous mucus production in the lungs and digestive tract?

Which of the following disorders is characterized by benign tumors made up of nerve cells and may include skeletal deformities?

In humans,brown eyes (B)are dominant over blue eyes (b).If a homozygous brown-eyed woman mates with a homozygous blue-eyed man,what would be the chances of producing a blue-eyed child?

In which kind of cross would you expect to find a ratio of 3:1 among the F2 offspring?

Assume freckles and dimples are dominant traits.Two individuals with freckles and dimples have a child with no freckles and no dimples.What are the genotypes of the parents?

If you were studying the phenomena of one gene having more than one effect,you would be studying which of the following?

What is a trait that is controlled by a combination of genes plus environmental influences?

Which of the following terms would be used for an allele which can mask the expression of another allele?

-This figure shows a human pedigree with two females (in third generation)with breast cancer.What is the genotype of their father?

This figure shows a human pedigree.Based on the information presented in this figure,what type of disorder would this be?

In a Mendelian monohybrid cross,which generation is always completely heterozygous.

The four o'clock flower is an example of incomplete dominance.R = red,r = white,and Rr = pink.If two hybrids are crossed,what are the chances that an offspring will have pink flowers?

When an organism has two identical alleles for a trait we would refer to this condition as:

In a recessive disorder,individuals who have that recessive allele but not the disorder are referred to as

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