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Traits that are determined by the effect of more than one gene are called ________.

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If an offspring has a total of 32 genes, it inherited _____ genes from each parent

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The genetic makeup of an organism, such as Gg, is its _______.

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Genes contain instructions for building


A) carbohydrates.
B) steroids.
C) proteins.
D) lipids.

E) B) and C)
F) A) and B)

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Experiments involving small numbers of offspring give more reliable experimental results than observing large numbers of offspring.

A) True
B) False

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Cystic fibrosis is caused by a recessive gene. If C = normal and c = cystic fibrosis, how can a child with cystic fibrosis have two parents that do not have cystic fibrosis?


A) The child has a genotype of CC.
B) The parents have genotypes of CC and Cc.
C) The parents have genotypes of Cc and Cc.
D) The child has a genotype of Cc.

E) B) and C)
F) C) and D)

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If both copies of a given gene in an organism are identical, the organism is homozygous for that trait.

A) True
B) False

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A genetic cross is used to produce organisms from species that would not normally interbreed.

A) True
B) False

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Most human genetic characters are


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

E) A) and C)
F) All of the above

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Which of the following statements is true?


A) Specific mutations occur because they are needed.
B) Recessive alleles follow different laws of inheritance than dominant alleles do.
C) Offspring get two copies of each gene from each parent.
D) Gametes fuse without regard to which alleles they carry.

E) A) and D)
F) A) and C)

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We need a hammer to pound nails into a board. Even if we have the nails, we can't pound them without first getting hold of a hammer. This is similar to the genetic relationship known as


A) heterozygosity.
B) codominance.
C) epistasis.
D) independent assortment.

E) C) and D)
F) All of the above

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Most traits are under the control of more than one gene.

A) True
B) False

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A thoroughbred race horse could have at most _____ alleles of the same gene.


A) 16
B) 8
C) 4
D) 2

E) A) and B)
F) A) and C)

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According to Mendel's law of _______, when gametes are formed the separation of alleles for one gene is unrelated to the separation of alleles for other genes.

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independen...

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In meiosis, two copies of a gene separate and end up in different __________.

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Individuals in the F₁ generation are always


A) homozygous recessive.
B) homozygous dominant.
C) heterozygous.
D) codominant.

E) A) and B)
F) All of the above

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


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

E) A) and C)
F) A) and B)

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If a person has one copy of each of two different alleles for a given gene, the person is _______ for that trait.


A) heterozygous
B) homozygous
C) recessive
D) true-breeding

E) C) and D)
F) A) and D)

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

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Humans have many genes that contribute to the unique array of proteins found on their red blood cells. Your MN blood type (the letters indicate the presence of M and N proteins on the red blood cells) is determined by the co-dominant alleles Lᴹ and Lᴺ. Which of the following genotypes could be produced when a man with MN blood and a woman with MN blood mate?


A) LMLM
B) LMLN
C) LNLN
D) all of the above

E) B) and D)
F) A) and D)

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