Question 1

If C is dominant to c, what fraction of offspring will be homozygous dominant when two heterozygous parents are crossed?

Accepted Answer

A) 0/4 
B) 1/4 
C) 2/4 
D) 3/4 
E) 4/4 
A) 0/4 
B) 1/4 
C) 2/4 
D) 3/4 
E) 4/4 B

Question 2

If C is dominant to c, what fraction of offspring will show the dominant phenotype when two heterozygous parents are crossed? ​

Accepted Answer

A) 0/4 
B) 1/4 
C) 2/4 
D) 3/4 
E) 4/4 
A) 0/4 
B) 1/4 
C) 2/4 
D) 3/4 
E) 4/4 D

Question 3

The wide-ranging effect of a single gene is called ____.

Accepted Answer

A) homozygous 
B) segregation 
C) pleiotropy 
D) independent assortment 
E) co-dominance 
A) homozygous 
B) segregation 
C) pleiotropy 
D) independent assortment 
E) co-dominance C

Question 4

If red flowers (R)is dominant over white flowers (r), plants with RR are ____.

Accepted Answer

A) heterozygous 
B) homozygous dominant 
C) red flowers 
D) white flowers 
E) pink flowers 
A) heterozygous 
B) homozygous dominant 
C) red flowers 
D) white flowers 
E) pink flowers

Question 5

If short hair (L)is dominant to long hair (l), then what fraction of the offspring produced by a cross of Ll ´ ll will be homozygous dominant?

Accepted Answer

A) 1/2 
B) 1/4 
C) 1/3 
D) 0 
E) 2/4 
A) 1/2 
B) 1/4 
C) 1/3 
D) 0 
E) 2/4

Question 6

A phenotype that is shaped by more than one gene and the environment is ____.

Accepted Answer

A) pleiotropy 
B) genomic imprinting 
C) codominance 
D) penetrance 
E) multifactorial 
A) pleiotropy 
B) genomic imprinting 
C) codominance 
D) penetrance 
E) multifactorial

Question 7

What term refers to each chemical version of a gene?

Accepted Answer

A) chromatid 
B) phenotype 
C) locus 
D) allele 
E) chromosome 
A) chromatid 
B) phenotype 
C) locus 
D) allele 
E) chromosome

Question 8

The genes that code for blood typing are an example of ____. ​

Accepted Answer

A) sex-linkage 
B) segregation 
C) pleiotropy 
D) independent assortment 
E) co-dominance 
A) sex-linkage 
B) segregation 
C) pleiotropy 
D) independent assortment 
E) co-dominance

Question 9

The genes that code for blood typing are an example of ____. ​

Accepted Answer

A) a multiple allele system 
B) segregation 
C) pleiotropy 
D) independent assortment 
E) sex-linkage 
A) a multiple allele system 
B) segregation 
C) pleiotropy 
D) independent assortment 
E) sex-linkage

Question 10

If C is dominant to c, what fraction of offspring will be homozygous when two heterozygous parents are crossed?

Accepted Answer

A) 0/4 
B) 1/4 
C) 2/4 
D) 3/4 
E) 4/4 
A) 0/4 
B) 1/4 
C) 2/4 
D) 3/4 
E) 4/4

Question 11

If one parent has blood type A and the other parent has blood type B, then which of the following blood types is possible in the children?

Accepted Answer

A) AB only 
B) A and AB only 
C) B and AB only 
D) A, B, AB, and O 
E) O only 
A) AB only 
B) A and AB only 
C) B and AB only 
D) A, B, AB, and O 
E) O only

Question 12

A parent with a genotype of AA will produce gametes ____.

Accepted Answer

A) with A 
B) with Aa 
C) with A or a 
D) that are heterozygous 
E) that are homozygous dominant 
A) with A 
B) with Aa 
C) with A or a 
D) that are heterozygous 
E) that are homozygous dominant

Question 13

What fraction of the time will the cross of Aa Bb with Aa Bb produce an offspring that is aa bb ? ​

Accepted Answer

A) 16/16 
B) 9/16 
C) 6/16 
D) 3/16 
E) 1/16 
A) 16/16 
B) 9/16 
C) 6/16 
D) 3/16 
E) 1/16

Question 14

Heterozygotes with the genotype HbA/HbS have ____. ​

Accepted Answer

A) sickle cell anemia 
B) malaria 
C) blood type AS 
D) Fanconi's anemia 
E) sickle cell trait 
A) sickle cell anemia 
B) malaria 
C) blood type AS 
D) Fanconi's anemia 
E) sickle cell trait

Question 15

How many copies of a specific allele does a somatic cell have?

Accepted Answer

A) 1 
B) 2 
C) 23 
D) 46 
E) 92 
A) 1 
B) 2 
C) 23 
D) 46 
E) 92

Question 16

A gene that has three or more alleles is called a ____. ​

Accepted Answer

A) pleiotropic gene 
B) dominant gene 
C) multiple allele system 
D) trivalent gene 
E) polyvalent gene 
A) pleiotropic gene 
B) dominant gene 
C) multiple allele system 
D) trivalent gene 
E) polyvalent gene

Question 17

Two copies of each chromosome separate from each other ____. ​

Accepted Answer

A) in germ cells 
B) during mitosis 
C) in somatic cell division 
D) during the S phase of the cell cycle 
E) to create a diploid cell 
A) in germ cells 
B) during mitosis 
C) in somatic cell division 
D) during the S phase of the cell cycle 
E) to create a diploid cell

Question 18

What type of trait is the result of a combination of gene expressions?

Accepted Answer

A) pleiotropy 
B) polygenic 
C) codominance 
D) penetrance 
E) multifactorial 
A) pleiotropy 
B) polygenic 
C) codominance 
D) penetrance 
E) multifactorial

Question 19

The ABO blood types have how many different genotypes?

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 12 
E) 16 
A) 4 
B) 6 
C) 8 
D) 12 
E) 16

Question 20

The observation of a range of phenotypes in a genetic trait is ____.

Accepted Answer

A) pleiotropy 
B) genomic imprinting 
C) codominance 
D) penetrance 
E) continuous variation 
A) pleiotropy 
B) genomic imprinting 
C) codominance 
D) penetrance 
E) continuous variation

Exam 19: Introduction to Genetics

If C is dominant to c, what fraction of offspring will be homozygous dominant when two heterozygous parents are crossed?

If C is dominant to c, what fraction of offspring will show the dominant phenotype when two heterozygous parents are crossed? ​

The wide-ranging effect of a single gene is called ____.

If red flowers (R)is dominant over white flowers (r), plants with RR are ____.

If short hair (L)is dominant to long hair (l), then what fraction of the offspring produced by a cross of Ll ´ ll will be homozygous dominant?

A phenotype that is shaped by more than one gene and the environment is ____.

What term refers to each chemical version of a gene?

The genes that code for blood typing are an example of ____. ​

The genes that code for blood typing are an example of ____. ​

If C is dominant to c, what fraction of offspring will be homozygous when two heterozygous parents are crossed?

If one parent has blood type A and the other parent has blood type B, then which of the following blood types is possible in the children?

A parent with a genotype of AA will produce gametes ____.

What fraction of the time will the cross of Aa Bb with Aa Bb produce an offspring that is aa bb ? ​

Heterozygotes with the genotype HbA/HbS have ____. ​

How many copies of a specific allele does a somatic cell have?

A gene that has three or more alleles is called a ____. ​

Two copies of each chromosome separate from each other ____. ​

What type of trait is the result of a combination of gene expressions?

The ABO blood types have how many different genotypes?

The observation of a range of phenotypes in a genetic trait is ____.

Learning About Human Biology

Chemistry of Life

Cells and How They Work

Tissues, Organs, and Organ Systems

The Skeletal System

The Muscular System

Circulation: the Heart and Blood Vessels

Blood

Immunity and Disease

The Respiratory System

Digestion and Nutrition

The Urinary System

The Nervous System

Sensory Systems

The Endocrine System

Reproductive Systems

Development and Aging

Cell Reproduction

Chromosomes and Human Genetics

DNA Genes and Biotechnology

Genes and Disease: Cancer

Principles of Evolution

Principles of Ecology

Human Impacts on the Biosphere

Filters

If C is dominant to c, what fraction of offspring will show the dominant phenotype when two heterozygous parents are crossed?

The genes that code for blood typing are an example of ____.

The genes that code for blood typing are an example of ____.

What fraction of the time will the cross of Aa Bb with Aa Bb produce an offspring that is aa bb ?

Heterozygotes with the genotype Hb^A/Hb^S have ____.

A gene that has three or more alleles is called a ____.

Two copies of each chromosome separate from each other ____.