Question 1

Traits that occur as a continuum in a population are likely to be due to __________.

Accepted Answer

A)   X-linked disorders
B)   polygenic inheritance
C)   single gene effect
D)   none of these

Question 2

Phenylketonuria is caused by __________.

Accepted Answer

A)   a single point mutation
B)   a dominant allele
C)   environmental factors such as diet
D)   a recessive allele

Question 3

Mendel's work proved the blended nature of inheritance.

Accepted Answer

A) True 
 B)False

Question 4

Using a Punnett square, illustrate and explain the F2 generation of Mendel's pea experiment.

Accepted Answer

Mendel's pea experiment involved crossin...

Question 5

Because X-linked disorders are essentially __________, they will only appear in the __________ sex.

Accepted Answer

A)   autonomic recessive disorders/ homogametic
B)   autonomic dominant disorders/ homogametic
C)   autonomic recessive disorders/ heterogametic
D)   autonomic dominant disorders/ heterogametic

Question 6

Discuss the concept of heritability. How might twin studies help us determine heritability?

Accepted Answer

Heritability is a concept that refers to...

Question 7

__________ is a measure of the proportion of the total variation observed in a population that can be attributed to genetics, rather than the environment.

Accepted Answer

A)   Eugenics
B)   Pleiotropy
C)   Heritability
D)   Qualitative variation

Question 8

Which of the following best defines the term genotype?

Accepted Answer

A)   the actual alleles an organism carries
B)   the physical expression of an organisms genes
C)   the role of the environment plays in gene expression
D)   an organisms haploid gametes

Question 9

Polygenic traits __________.

Accepted Answer

A)   are usually caused by single genes
B)   are easily explained by Mendelian genetics
C)   appear as a continuum in a population
D)   all of these

Question 10

Regulatory regions are likely to play a stronger role than structural genes in creating variations between related species.

Accepted Answer

A) True 
 B)False

Question 11

One gene can have multiple phenotypic effects.

Accepted Answer

A) True 
 B)False

Question 12

Mutations during meiosis are especially important because they __________.

Accepted Answer

A)   are usually lethal
B)   tend to occur in regulatory genes
C)   are inherited
D)   are more common

Question 13

The effects of the PKU allele __________.

Accepted Answer

A)   can be combated with dietary regulation
B)   are immediately fatal
C)   pose no threat to infants
D)   are more dangerous in adults

Question 14

Mendel's first postulate states that hereditary characteristics are controlled by blended units.

Accepted Answer

A) True 
 B)False

Question 15

Trinucleotide repeat diseases are caused by __________.

Accepted Answer

A)   insertion mutations
B)   autosomal recessive mutations
C)   deletion mutations
D)   point mutations

Question 16

Sickle cell anemia is an example of a disease resulting from an insertion mutation.

Accepted Answer

A) True 
 B)False

Question 17

The closer genes are to each other on a chromosome __________.

Accepted Answer

A)   the more likely they are to be separated due to crossing over
B)   the less likely they are to be separated due to crossing over
C)   the more likely they are to be linked in mitosis
D)   the less likely they are to be linked

Question 18

A 1920s public presentation of Mendelian genetics would emphasize __________.

Accepted Answer

A)   the dangers of evolution
B)   the dangers of mating with "abnormal" people
C)   Darwin's ideas of natural selection
D)   ideas of blending inheritance

Question 19

A recessive allele __________.

Accepted Answer

A)   needs to be present on only one chromosome to be expressed
B)   is never expressed
C)   needs to be present on both chromosomes to be expressed
D)   occurs as a regulatory gene only

Question 20

From a gene's perspective, the "environment" is made up mainly of __________.

Accepted Answer

A)   nutritional factors
B)   factors such as air temperature and atmospheric gasses
C)   body temperature
D)   other genes

Exam 3: Genetics: From Genotype to Phenotype

Using a Punnett square, illustrate and explain the F2 generation of Mendel's pea experiment.

Correct AnswerAnswered by ExamLex AIMendel's pea experiment involved crossin...View AnswerShow Answer

Which of the following best defines the term genotype?

Correct AnswerverifiedShow Answer

Polygenic traits __________.

Correct AnswerverifiedShow Answer

Mutations during meiosis are especially important because they __________.

Correct AnswerverifiedShow Answer

Regulatory regions are likely to play a stronger role than structural genes in creating variations between related species.

Correct AnswerverifiedShow Answer

From a gene's perspective, the "environment" is made up mainly of __________.

Correct AnswerverifiedShow Answer

Trinucleotide repeat diseases are caused by __________.

Correct AnswerverifiedShow Answer

Discuss the concept of heritability. How might twin studies help us determine heritability?

Correct AnswerAnswered by ExamLex AIHeritability is a concept that refers to...View AnswerShow Answer

__________ is a measure of the proportion of the total variation observed in a population that can be attributed to genetics, rather than the environment.

Correct AnswerverifiedShow Answer

The closer genes are to each other on a chromosome __________.

Correct AnswerverifiedShow Answer

The effects of the PKU allele __________.

Correct AnswerverifiedShow Answer

One gene can have multiple phenotypic effects.

Correct AnswerverifiedShow Answer

Mendel's first postulate states that hereditary characteristics are controlled by blended units.

Correct AnswerverifiedShow Answer

Sickle cell anemia is an example of a disease resulting from an insertion mutation.

Correct AnswerverifiedShow Answer

Because X-linked disorders are essentially __________, they will only appear in the __________ sex.

Correct AnswerverifiedShow Answer

A 1920s public presentation of Mendelian genetics would emphasize __________.

Correct AnswerverifiedShow Answer

A recessive allele __________.

Correct AnswerverifiedShow Answer

Phenylketonuria is caused by __________.

Correct AnswerverifiedShow Answer

Mendel's work proved the blended nature of inheritance.

Correct AnswerverifiedShow Answer

Traits that occur as a continuum in a population are likely to be due to __________.

Correct AnswerverifiedShow Answer

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Mendel's pea experiment involved crossin...
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Heritability is a concept that refers to...
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Because X-linked disorders are essentially , they will only appear in the sex.

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