Question 1

Two alleles of each gene are packaged into separate gametes and they move apart from each other during gamete formation summarizes Mendel's

Accepted Answer

A) law of segregation. 
B) law of random fertilization. 
C) law of population dynamics. 
D) law of crossing over. 
E) law of independent assortment. 
A) law of segregation. 
B) law of random fertilization. 
C) law of population dynamics. 
D) law of crossing over. 
E) law of independent assortment.

Question 2

The genotypes shown in the figure are for a recessive genetic disorder.

Accepted Answer

A) True 
 B)False

Question 3

In pedigree charts,autosomal recessive disorders typically

Accepted Answer

A) appear in every generation. 
B) appear only in males. 
C) appear only in females. 
D) seem to disappear in one generation,only to reappear in the next generation. 
E) occur every third generation. 
A) appear in every generation. 
B) appear only in males. 
C) appear only in females. 
D) seem to disappear in one generation,only to reappear in the next generation. 
E) occur every third generation.

Question 4

Mendel's monohybrid cross of tall parents with the genotype Tt resulted in a tall to short ratio of

Accepted Answer

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

Question 5

Uncorrected mistakes during meiosis will lead to

Accepted Answer

A) production of only autosomes with mutations. 
B) production of only sex chromosomes with mutations. 
C) no living offspring. 
D) no change. 
E) production of gametes with mutated genes. 
A) production of only autosomes with mutations. 
B) production of only sex chromosomes with mutations. 
C) no living offspring. 
D) no change. 
E) production of gametes with mutated genes.

Question 6

Mendel's law of segregation states that the two alleles of each gene are packaged into separate gametes.

Accepted Answer

A) True 
 B)False

Question 7

In the section "Investigating Life: Heredity and the Hungry Hordes",what did the researchers conclude from the data in the figure?

Accepted Answer

A) that resistance to Bt toxin is dominant 
B) that the number of larvae is dependent on treatment with Bt toxin 
C) that resistance to Bt toxin is recessive 
D) that the size of larvae is dependent on treatment with Bt toxin 
E) that resistance to Bt toxin is not genetic 
A) that resistance to Bt toxin is dominant 
B) that the number of larvae is dependent on treatment with Bt toxin 
C) that resistance to Bt toxin is recessive 
D) that the size of larvae is dependent on treatment with Bt toxin 
E) that resistance to Bt toxin is not genetic

Question 8

A dihybrid cross is a mating between two individuals that are each ______________ for ___________ gene (genes).

Accepted Answer

A) homozygous,one 
B) homozygous,two 
C) homologous,two 
D) heterozygous,one 
E) heterozygous,two 
A) homozygous,one 
B) homozygous,two 
C) homologous,two 
D) heterozygous,one 
E) heterozygous,two

Question 9

If you cross two heterozygous (Yy)pea plants,what proportion of the offspring will be heterozygous?

Accepted Answer

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

Question 10

Recessive alleles seem to vanish in some generations and reappear in later generations because

Accepted Answer

A) they cannot be expressed in males. 
B) they are masked by a dominant allele. 
C) they cannot be expressed in females. 
D) they cannot be expressed in successive generations. 
E) they are lost by mutation. 
A) they cannot be expressed in males. 
B) they are masked by a dominant allele. 
C) they cannot be expressed in females. 
D) they cannot be expressed in successive generations. 
E) they are lost by mutation.

Question 11

Average heights of American men and women have increased steadily since the 1940s.What is the best explanation for this observation?

Accepted Answer

A) Height is a polygenic trait. 
B) Height is influenced by an X-linked gene. 
C) Height is influenced by environmental changes like improvements in diet. 
D) Height is influenced by a Y-linked gene. 
E) Height is influenced by crossing over. 
A) Height is a polygenic trait. 
B) Height is influenced by an X-linked gene. 
C) Height is influenced by environmental changes like improvements in diet. 
D) Height is influenced by a Y-linked gene. 
E) Height is influenced by crossing over.

Question 12

To inherit an autosomal recessive disorder requires the person receive the disease causing allele from

Accepted Answer

A) the father only. 
B) the mother only. 
C) only the parent having the disease. 
D) only one parent who is homozygous recessive for the disease. 
E) both parents. 
A) the father only. 
B) the mother only. 
C) only the parent having the disease. 
D) only one parent who is homozygous recessive for the disease. 
E) both parents.

Question 13

If the two alleles for a particular gene are different the gene pair is

Accepted Answer

A) homologous. 
B) heterozygous. 
C) homozygous. 
D) dominant. 
E) recessivE. 
A) homologous. 
B) heterozygous. 
C) homozygous. 
D) dominant. 
E) recessivE.

Question 14

If you cross RrYy and RRyy pea plants,what fraction of the offspring will have round peas? R=round,r=wrinkled,Y=yellow,y=green

Accepted Answer

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

Question 15

The most common allele for any trait is always the dominant allele.

Accepted Answer

A) True 
 B)False

Question 16

If a pea plant is heterozygous for yellow seeds (Yy),which gametes will it produce?

Accepted Answer

A) Y only 
B) Y or y 
C) y only 
D) Yy 
E) YYyy 
A) Y only 
B) Y or y 
C) y only 
D) Yy 
E) YYyy

Question 17

In cystic fibrosis,two unaffected carriers can have a child with the disease.It is as common in boys as in girls.This disease is

Accepted Answer

A) autosomal dominant. 
B) X-linked recessive. 
C) autosomal recessive. 
D) X-linked dominant. 
E) pleiotropic. 
A) autosomal dominant. 
B) X-linked recessive. 
C) autosomal recessive. 
D) X-linked dominant. 
E) pleiotropic.

Question 18

Crossing over is more likely to separate genes on a chromosome if they are

Accepted Answer

A) close together. 
B) far apart. 
C) recessive genes. 
D) dominant genes. 
E) mutated genes. 
A) close together. 
B) far apart. 
C) recessive genes. 
D) dominant genes. 
E) mutated genes.

Question 19

Genotypes are the outward expression of an allele combination.

Accepted Answer

A) True 
 B)False

Question 20

Having the alleles Tt is

Accepted Answer

A) a phenotype. 
B) linkage. 
C) a genotype. 
D) a gene. 
E) a loci. 
A) a phenotype. 
B) linkage. 
C) a genotype. 
D) a gene. 
E) a loci.

Exam 10: Patterns of Inheritance

Two alleles of each gene are packaged into separate gametes and they move apart from each other during gamete formation summarizes Mendel's

The genotypes shown in the figure are for a recessive genetic disorder.

In pedigree charts,autosomal recessive disorders typically

Mendel's monohybrid cross of tall parents with the genotype Tt resulted in a tall to short ratio of

Uncorrected mistakes during meiosis will lead to

Mendel's law of segregation states that the two alleles of each gene are packaged into separate gametes.

In the section "Investigating Life: Heredity and the Hungry Hordes",what did the researchers conclude from the data in the figure?

A dihybrid cross is a mating between two individuals that are each ______________ for ___________ gene (genes).

If you cross two heterozygous (Yy)pea plants,what proportion of the offspring will be heterozygous?

Recessive alleles seem to vanish in some generations and reappear in later generations because

Average heights of American men and women have increased steadily since the 1940s.What is the best explanation for this observation?

To inherit an autosomal recessive disorder requires the person receive the disease causing allele from

If the two alleles for a particular gene are different the gene pair is

If you cross RrYy and RRyy pea plants,what fraction of the offspring will have round peas? R=round,r=wrinkled,Y=yellow,y=green

The most common allele for any trait is always the dominant allele.

If a pea plant is heterozygous for yellow seeds (Yy),which gametes will it produce?

In cystic fibrosis,two unaffected carriers can have a child with the disease.It is as common in boys as in girls.This disease is

Crossing over is more likely to separate genes on a chromosome if they are

Genotypes are the outward expression of an allele combination.

Having the alleles Tt is

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A dihybrid cross is a mating between two individuals that are each ____ for _ gene (genes).