Question 1

If an individual is heterozygous for a particular trait:

Accepted Answer

A) Each parent contributed a different allele for that trait 
B) Each parent contributed the same allele for that trait 
C) One parent contributed two different alleles for that trait 
D) One parent contributed two copies of the same allele for that trait 
A) Each parent contributed a different allele for that trait 
B) Each parent contributed the same allele for that trait 
C) One parent contributed two different alleles for that trait 
D) One parent contributed two copies of the same allele for that trait

Question 2

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 3

Adult female bollworm moths lay eggs on cotton bolls.These eggs then hatch,and grow into caterpillars that eat the seeds of the boll.Eggs and sperm would be produced by:

Accepted Answer

A) Meiosis 
B) Mitosis 
C) Fertilization 
D) Crossing over 
E) Translocation 
A) Meiosis 
B) Mitosis 
C) Fertilization 
D) Crossing over 
E) Translocation

Question 4

In the study of genetics the offspring of the parental generation is referred to as the:

Accepted Answer

A) Wild type generation 
B) The F1 generation 
C) The P generation 
D) The F2 generation 
E) The phenotype 
A) Wild type generation 
B) The F1 generation 
C) The P generation 
D) The F2 generation 
E) The phenotype

Question 5

A monohybrid cross is a mating between two individuals that are both:

Accepted Answer

A) Homozygous for one gene 
B) Heterozygous for two genes 
C) Homozygous for two genes 
D) Heterozygous for one gene 
E) None of these are correct 
A) Homozygous for one gene 
B) Heterozygous for two genes 
C) Homozygous for two genes 
D) Heterozygous for one gene 
E) None of these are correct

Question 6

Mendel called a masking trait:

Accepted Answer

A) Dominant 
B) Recessive 
C) Homologous 
D) Homozygous 
E) Heterozygous 
A) Dominant 
B) Recessive 
C) Homologous 
D) Homozygous 
E) Heterozygous

Question 7

If you cross two heterozygous Yy pea plants,what fraction 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 8

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

Accepted Answer

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

Question 9

The "P" in P generation:

Accepted Answer

A) Refers to pure breeding 
B) Refers to parental 
C) Refers to potential offspring 
D) Refers to the recessive allele 
E) All are correct 
A) Refers to pure breeding 
B) Refers to parental 
C) Refers to potential offspring 
D) Refers to the recessive allele 
E) All are correct

Question 10

Any monohybrid cross consisting of one dominant and one recessive allele for the trait being studied should result in a ratio of ______________ dominant to __________________ recessive.

Accepted Answer

A) Three, one 
B) One, one 
C) One, two 
D) Two, one 
E) One, three 
A) Three, one 
B) One, one 
C) One, two 
D) Two, one 
E) One, three

Question 11

Mendel's monohybrid cross of "Tt" parents 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 12

A karyotype is produced by inducing cells to divide in culture and then treating the cells with a drug that halts mitosis in:

Accepted Answer

A) Metaphase 
B) Interphase 
C) Prophase 
D) Anaphase 
E) Telophase 
A) Metaphase 
B) Interphase 
C) Prophase 
D) Anaphase 
E) Telophase

Question 13

The chromosome that plays the largest role in human sex determination is:

Accepted Answer

A) The X chromosome 
B) Chromosome number 21 
C) The group of autosomes known as the SRY group 
D) Chromosome number 22 
E) The Y chromosome 
A) The X chromosome 
B) Chromosome number 21 
C) The group of autosomes known as the SRY group 
D) Chromosome number 22 
E) The Y chromosome

Question 14

A male expresses:

Accepted Answer

A) Only the dominant alleles on his X chromosome 
B) Both the dominant and recessive alleles on his X chromosome 
C) Only the homozygous recessive alleles on his X chromosome 
D) None of the alleles on his X chromosome 
E) None of these are correct 
A) Only the dominant alleles on his X chromosome 
B) Both the dominant and recessive alleles on his X chromosome 
C) Only the homozygous recessive alleles on his X chromosome 
D) None of the alleles on his X chromosome 
E) None of these are correct

Question 15

A Barr body is:

Accepted Answer

A) An inactive Y chromosome 
B) An inactive autosome 
C) An active X chromosome 
D) An active Y chromosome 
E) An inactive X chromosome 
A) An inactive Y chromosome 
B) An inactive autosome 
C) An active X chromosome 
D) An active Y chromosome 
E) An inactive X chromosome

Question 16

Bollworms raised for decades in a lab without exposure to Bt were ___ while those fed Bt were ___.

Accepted Answer

A) rr, RR 
B) Rr, rr 
C) RR, Rr 
D) RR, rr 
E) Rr, RR 
A) rr, RR 
B) Rr, rr 
C) RR, Rr 
D) RR, rr 
E) Rr, RR

Question 17

Mendel called a trait that is masked:

Accepted Answer

A) Homozygous 
B) Heterozygous 
C) Dominant 
D) Recessive 
E) None are correct 
A) Homozygous 
B) Heterozygous 
C) Dominant 
D) Recessive 
E) None are correct

Question 18

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 19

If any of the traits that Mendel worked with had been due to linked genes,his dihybrid crosses:

Accepted Answer

A) Would have had different results 
B) Would have produced more offspring 
C) Would have produced less offspring 
D) Would have exhibited a typical phenotypic ratio of 9:3:3:1 
E) Would have produced sterile offspring 
A) Would have had different results 
B) Would have produced more offspring 
C) Would have produced less offspring 
D) Would have exhibited a typical phenotypic ratio of 9:3:3:1 
E) Would have produced sterile offspring

Question 20

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

Exam 10: Patterns of Inheritance

If an individual is heterozygous for a particular trait:

In pedigree charts,autosomal recessive disorders typically:

Adult female bollworm moths lay eggs on cotton bolls.These eggs then hatch,and grow into caterpillars that eat the seeds of the boll.Eggs and sperm would be produced by:

In the study of genetics the offspring of the parental generation is referred to as the:

A monohybrid cross is a mating between two individuals that are both:

Mendel called a masking trait:

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

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

The "P" in P generation:

Any monohybrid cross consisting of one dominant and one recessive allele for the trait being studied should result in a ratio of ______________ dominant to __________________ recessive.

Mendel's monohybrid cross of "Tt" parents resulted in a tall to short ratio of:

A karyotype is produced by inducing cells to divide in culture and then treating the cells with a drug that halts mitosis in:

The chromosome that plays the largest role in human sex determination is:

A male expresses:

A Barr body is:

Bollworms raised for decades in a lab without exposure to Bt were ___ while those fed Bt were ___.

Mendel called a trait that is masked:

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

If any of the traits that Mendel worked with had been due to linked genes,his dihybrid crosses:

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

What Is Life

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Dna Structure and Gene Function

Dna Replication, mitosis and the Cell Cycle

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The Forces of Evolutionary Change

Evidence for Evolution

Speciation and Extinction

The Origin and History of Life

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Protists

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Reproduction and Development of Flowering Plants

Animal Tissues, organ Systems and Homeostasis

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Regulation of Temperature and Body Fluids

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Animal Behavior

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Filters

Any monohybrid cross consisting of one dominant and one recessive allele for the trait being studied should result in a ratio of dominant to ____ recessive.

Bollworms raised for decades in a lab without exposure to Bt were _ while those fed Bt were _.