Question 1

The large variation in shoe size among humans is due to a trait that is

Accepted Answer

A)  dizygotic. 
B)  qualitative. 
C)  quantitative. 
D)  polygenic. 
A)  dizygotic. 
B)  qualitative. 
C)  quantitative. 
D)  polygenic.

Question 2

A dominant genetic disorder occurs when

Accepted Answer

A)  only one allele of the gene is the mutant allele. 
B)  both alleles of the gene are the mutant allele. 
C)  neither allele of the gene is the mutant allele. 
D)  either one or both alleles of the gene are mutant. 
A)  only one allele of the gene is the mutant allele. 
B)  both alleles of the gene are the mutant allele. 
C)  neither allele of the gene is the mutant allele. 
D)  either one or both alleles of the gene are mutant.

Question 3

Which of the following pairs of people would provide the most useful information to geneticists, regarding the heritability of a certain trait?

Accepted Answer

A)  non-twin siblings separated into different households soon after birth 
B)  monozygotic twins separated into different households soon after birth 
C)  non-twin siblings raised in the same household since birth 
D)  monozygotic twins raised in the same household since birth 
A)  non-twin siblings separated into different households soon after birth 
B)  monozygotic twins separated into different households soon after birth 
C)  non-twin siblings raised in the same household since birth 
D)  monozygotic twins raised in the same household since birth

Question 4

Alternate forms of a gene are called

Accepted Answer

A)  alleles. 
B)  chromosomes. 
C)  gametes. 
D)  homologues. 
A)  alleles. 
B)  chromosomes. 
C)  gametes. 
D)  homologues.

Question 5

Which of these produces genetic diversity in a population?

Accepted Answer

A)  independent assortment 
B)  random fertilization 
C)  segregation 
D)  mutation 
A)  independent assortment 
B)  random fertilization 
C)  segregation 
D)  mutation

Question 6

What causes the differences between two human cell types (for example, a skin cell and a brain cell)?

Accepted Answer

A)  Different cell types begin with the same genes but eliminate certain genes as they develop. 
B)  Different cell types contain different genes. 
C)  Different cell types contain different proteins that give each cell a different function. 
D)  Different cell types contain the same genes but use different combinations of them. 
A)  Different cell types begin with the same genes but eliminate certain genes as they develop. 
B)  Different cell types contain different genes. 
C)  Different cell types contain different proteins that give each cell a different function. 
D)  Different cell types contain the same genes but use different combinations of them.

Question 7

Homologous chromosomes

Accepted Answer

A)  almost always contain identical alleles. 
B)  generally contain the same genes. 
C)  are inherited together because they don't separate during meiosis. 
D)  are fewer in body cells than in gametes. 
A)  almost always contain identical alleles. 
B)  generally contain the same genes. 
C)  are inherited together because they don't separate during meiosis. 
D)  are fewer in body cells than in gametes.

Question 8

Segments of DNA that generally code for proteins are called ________.

Accepted Answer

The answer of Segments of DNA that generally code for...

Question 9

What is the term used to describe a trait that is controlled by many genes?

Accepted Answer

A)  dihybrid 
B)  dominant 
C)  heritable 
D)  polygenic 
A)  dihybrid 
B)  dominant 
C)  heritable 
D)  polygenic

Question 10

An individual who is a carrier for a recessive genetic disorder but does not have symptoms of the disorder is

Accepted Answer

A)  heterozygous. 
B)  homozygous for the recessive allele. 
C)  homozygous for the dominant allele. 
D)  either homozygous for the recessive allele or heterozygous. 
A)  heterozygous. 
B)  homozygous for the recessive allele. 
C)  homozygous for the dominant allele. 
D)  either homozygous for the recessive allele or heterozygous.

Question 11

A trait that shows continuous variation is typically influenced by

Accepted Answer

A)  genes only. 
B)  environmental factors only. 
C)  both genes and environmental factors. 
D)  neither genes nor environmental factors. 
A)  genes only. 
B)  environmental factors only. 
C)  both genes and environmental factors. 
D)  neither genes nor environmental factors.

Question 12

Which of the following is true about genes that are located on different chromosomes?

Accepted Answer

A)  These genes are inherited independently of each other. 
B)  Only the dominant alleles of these genes tend to be inherited together. 
C)  These genes are always inherited together. 
D)  These genes are more likely to undergo mutation. 
A)  These genes are inherited independently of each other. 
B)  Only the dominant alleles of these genes tend to be inherited together. 
C)  These genes are always inherited together. 
D)  These genes are more likely to undergo mutation.

Question 13

If a certain recessive allele can cause a change in cellular proteins that ultimately leads to circulatory problems and premature death, then

Accepted Answer

A)  any homozygous individual will always have an advantage over any heterozygous individual. 
B)  any heterozygous individual will always have an advantage over any homozygous individual. 
C)  any homozygous individual will always have a disadvantage compared to any heterozygous individual. 
D)  any heterozygous individual will have an advantage over any homozygous recessive individual. 
A)  any homozygous individual will always have an advantage over any heterozygous individual. 
B)  any heterozygous individual will always have an advantage over any homozygous individual. 
C)  any homozygous individual will always have a disadvantage compared to any heterozygous individual. 
D)  any heterozygous individual will have an advantage over any homozygous recessive individual.

Question 14

Cystic fibrosis is caused by the allele f, which is completely recessive to the normal dominant allele F. Consider a couple with the genotype Ff. What is the chance that their first child will develop cystic fibrosis?

Accepted Answer

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

Question 15

The estimated influence of genes (as opposed to environment)on a trait is called ________.

Accepted Answer

The answer of The estimated influence of genes (as opposed...

Question 16

CFTR/CFTR-$\Delta$F508 refers to the

Accepted Answer

A)  dominant allele that causes cystic fibrosis. 
B)  recessive allele that causes cystic fibrosis. 
C)  homozygous genotype of a cystic fibrosis victim. 
D)  heterozygous genotype of a carrier of cystic fibrosis. 
A)  dominant allele that causes cystic fibrosis. 
B)  recessive allele that causes cystic fibrosis. 
C)  homozygous genotype of a cystic fibrosis victim. 
D)  heterozygous genotype of a carrier of cystic fibrosis.

Question 17

A heterozygous organism

Accepted Answer

A)  always shows a recessive trait. 
B)  can't produce gametes. 
C)  has two identical alleles of a gene. 
D)  has two different alleles of a gene. 
A)  always shows a recessive trait. 
B)  can't produce gametes. 
C)  has two identical alleles of a gene. 
D)  has two different alleles of a gene.

Question 18

Which of the following is a cross between parents who each have two different alleles for each of two different genes?

Accepted Answer

A)  AAbb x aaBB 
B)  aabb x AABB 
C)  AaBb x AaBb 
D)  AaBB x AABb 
A)  AAbb x aaBB 
B)  aabb x AABB 
C)  AaBb x AaBb 
D)  AaBB x AABb

Question 19

Combined, your parents could have produced as many as ________ different types of children, genetically speaking.

Accepted Answer

A)  46 
B)  285 
C)  8 million 
D)  64 trillion 
A)  46 
B)  285 
C)  8 million 
D)  64 trillion

Question 20

Because of the law of independent assortment,

Accepted Answer

A)  an individual will get most of their alleles from one parent. 
B)  monozygotic twins will have about 50% of their alleles in common. 
C)  two typical siblings will have about 50% of their alleles in common. 
D)  dizygotic twins will have 100% of their alleles in common. 
A)  an individual will get most of their alleles from one parent. 
B)  monozygotic twins will have about 50% of their alleles in common. 
C)  two typical siblings will have about 50% of their alleles in common. 
D)  dizygotic twins will have 100% of their alleles in common.

Exam 7: Are You Only as Smart as Your Genes? Mendelian and Quantitative Genetics

The large variation in shoe size among humans is due to a trait that is

A dominant genetic disorder occurs when

Which of the following pairs of people would provide the most useful information to geneticists, regarding the heritability of a certain trait?

Alternate forms of a gene are called

Which of these produces genetic diversity in a population?

What causes the differences between two human cell types (for example, a skin cell and a brain cell)?

Homologous chromosomes

Segments of DNA that generally code for proteins are called ________.

What is the term used to describe a trait that is controlled by many genes?

An individual who is a carrier for a recessive genetic disorder but does not have symptoms of the disorder is

A trait that shows continuous variation is typically influenced by

Which of the following is true about genes that are located on different chromosomes?

If a certain recessive allele can cause a change in cellular proteins that ultimately leads to circulatory problems and premature death, then

Cystic fibrosis is caused by the allele f, which is completely recessive to the normal dominant allele F. Consider a couple with the genotype Ff. What is the chance that their first child will develop cystic fibrosis?

The estimated influence of genes (as opposed to environment)on a trait is called ________.

CFTR/CFTR- Δ\DeltaΔ F508 refers to the

A heterozygous organism

Which of the following is a cross between parents who each have two different alleles for each of two different genes?

Combined, your parents could have produced as many as ________ different types of children, genetically speaking.

Because of the law of independent assortment,

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CFTR/CFTR- $\Delta$ F508 refers to the