Question 1

The leaf color of a certain plant is controlled by one gene. For that gene, the allele G = orange and g = green. You have a plant with orange leaves, but do not know whether that plant's genotype is GG or Gg. Which of the following would help you determine the plant's genotype?

Accepted Answer

A) Cross the plant to another plant with orange leaves. 
B) Cross the plant to a plant with green leaves. 
C) Cross two true-breeding, orange-leaved plants to each other and then cross one of their offspring to the plant with the unknown genotype. 
D) Change the environment in which the plant grows to find the conditions that cause the leaves to produce the orange color.

Question 2

Which of the following observations refutes the theory of blending inheritance?

Accepted Answer

A) When a red plant is crossed with a white plant, the resulting offspring are pink. 
B) Most of the features of offspring are not intermediates of their parents' traits. 
C) Gametes carrying different types of alleles cannot fuse successfully. 
D) After meiosis, two copies of a given gene end up in the same gamete.

Question 3

Environmental factors can alter the effects of genes.

Accepted Answer

A) True 
 B)False

Question 4

In this Punnett square, the genotypes inside the boxes (a few are indicated by arrows here)represent the number and type of offspring a given pair of individuals will produce when mated.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following statements is not true?

Accepted Answer

A) Two organisms with the same genotype are homozygous. 
B) Two organisms with the same phenotype may have different genotypes. 
C) A heterozygous organism may have the same phenotype as a homozygous organism. 
D) A heterozygous organism has the same number of copies of a given gene as a homozygous organism.

Question 6

Which of the following choices represents the genotype of an individual diploid organism?

Accepted Answer

A) BbCCdd 
B) BCd 
C) bCd 
D) BbCd

Question 7

Most human genetic characters are

Accepted Answer

A) controlled by one gene. 
B) not inherited according to Mendel's laws. 
C) controlled by more than one gene. 
D) not heritable.

Question 8

Which of the following represents all of the possible gametes that can be formed by an individual with the genetic makeup FfGgHH?

Accepted Answer

A) FGH, FgH, fGH, fgH 
B) Ff, Gg, HH 
C) FG, FH, Fg, fH, fG, fg, GH, gH 
D) FfGhHH, FFGGHH, ffgghh

Question 9

What is the smallest number of traits that are needed to test Mendel's law of independent assortment?

Accepted Answer

A) one 
B) two 
C) four 
D) eight

Question 10

The Iᴬ and Iᴮ alleles involved in human blood type differ in that they attach different ____________________ to the surface of red blood cells.

Accepted Answer

The answer of The Iᴬ and Iᴮ alleles involved in...

Question 11

During meiosis, two copies of a gene separate and end up in different ____________________.

Accepted Answer

The answer of During meiosis, two copies of a gene...

Question 12

A recessive allele can only appear in the phenotype of an individual

Accepted Answer

A) in the F1 generation. 
B) exposed to certain environmental conditions. 
C) who carries the mutation in his or her gametes. 
D) who is homozygous for the mutation.

Question 13

New alleles arise as a result of independent assortment during meiosis.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following statements is a basic summary of one of Mendel's laws?

Accepted Answer

A) All beneficial human genetic traits are dominant, and harmful traits are recessive. 
B) The pattern of inherited characteristics of organisms is not predictable. 
C) The separation of alleles for one gene does not affect the separation of alleles for other genes. 
D) Recessive alleles cause the death of the gamete.

Question 15

Inheritance of ABO blood type in humans is an example of

Accepted Answer

A) codominance. 
B) complete dominance of one allele over another. 
C) a gene that is coded by more than two alleles. 
D) all of the above

Question 16

If two alleles for the same trait have an equal effect on the phenotype, the alleles are ____________________.

Accepted Answer

The answer of If two alleles for the same trait...

Question 17

Traits that are determined by the effect of more than one gene are known as polygenic.

Accepted Answer

A) True 
 B)False

Question 18

If an offspring has a total of 32 alleles for 16 genes, it inherited ____________________ alleles from each parent.

Accepted Answer

The answer of If an offspring has a total of...

Question 19

Alternate versions of the same gene, such as blue or brown for eye color, are known as ____________________.

Accepted Answer

The answer of Alternate versions of the same gene, such...

Question 20

A mutation that occurs in a diploid cell can be inherited only if the

Accepted Answer

A) mutated allele is recessive. 
B) mutated allele is dominant. 
C) mutation occurs in a cell that produces gametes. 
D) same mutation also occurs on the homologous chromosome.

Exam 12: Patterns of Inheritance

The leaf color of a certain plant is controlled by one gene. For that gene, the allele G = orange and g = green. You have a plant with orange leaves, but do not know whether that plant's genotype is GG or Gg. Which of the following would help you determine the plant's genotype?

Which of the following observations refutes the theory of blending inheritance?

Environmental factors can alter the effects of genes.

In this Punnett square, the genotypes inside the boxes (a few are indicated by arrows here)represent the number and type of offspring a given pair of individuals will produce when mated.

Which of the following statements is not true?

Which of the following choices represents the genotype of an individual diploid organism?

Most human genetic characters are

Which of the following represents all of the possible gametes that can be formed by an individual with the genetic makeup FfGgHH?

What is the smallest number of traits that are needed to test Mendel's law of independent assortment?

The Iᴬ and Iᴮ alleles involved in human blood type differ in that they attach different ____________________ to the surface of red blood cells.

During meiosis, two copies of a gene separate and end up in different ____________________.

A recessive allele can only appear in the phenotype of an individual

New alleles arise as a result of independent assortment during meiosis.

Which of the following statements is a basic summary of one of Mendel's laws?

Inheritance of ABO blood type in humans is an example of

If two alleles for the same trait have an equal effect on the phenotype, the alleles are ____________________.

Traits that are determined by the effect of more than one gene are known as polygenic.

If an offspring has a total of 32 alleles for 16 genes, it inherited ____________________ alleles from each parent.

Alternate versions of the same gene, such as blue or brown for eye color, are known as ____________________.

A mutation that occurs in a diploid cell can be inherited only if the