Genes
Heredity
Mendel
Chromosomes
Hodge Podge
100
Which of the following terms best describes the genotype Bb?
A)homozygous dominant
B)heterozygous
C)homozygous recessive
D)heterozygous dominant
What is heterozygous.
100
A husband and wife have three girls. What are the chances that they will have another daughter?
A)1/2
B)1/4
C)3/4
D)1/3
What is 1/2.
100
What aspect of Mendel's background gave him the necessary tools to discover the laws of inheritance?
A)He was a monk
B)He was a teacher
C)He lived in Austria
D)He had studied mathematics and probability.
What is a monk.
100
Of the following, which is an autosomal dominant disorder?
A)Huntington's disease
B)cystic fibrosis
C)muscular dystrophy
D)sickle-cell anemia
What is Huntington's disease.
100
Individuals in the 1800s (when hunger and childhood diseases were common) averaged slightly over five feet tall, but their offspring in the 1900s were substantially taller on average. This reflects the influence of
A)polygenic inheritance.
B)crossing-over.
C)gene linkage.
D)environmental factors.
What is environmental factors.
200
There are two mice that are brown in color. Brown is a dominant allele in mice. In order to determine whether the mice are homozygous dominant or heterozygous, which of the following mice could you cross with them?
A)homozygous dominant
B)heterozygous
C)homozygous recessive
D)hybrid
What is homozygous recessive.
200
A man who is color-blind and a woman who is a carrier for color-blindness marry. What are the chances that their daughter will be afflicted?
A)25%
B)50%
C)100%
D)75%
What is 50%.
200
If a pea plant shows a recessive phenotype,
A)it can be either Tt or tt.
B)it can be only TT.
C)it can be only tt.
D)it can be TT, Tt, or tt.
What is it can be only tt.
200
What is the blending theory of inheritance?
A)Mendel's theory of how the traits of parents are passed to offspring through the gametes
B)Darwin's theory of how traits are passed from all parts of the parent's body into the gamete to be transmitted to the offspring
C)the modern theory of how genetic information is passed from parents to offspring
D)an old theory stating that offspring show traits intermediate between those of the parents
What is an old theory stating that offspring show traits intermediate between those of the parents.
200
Haiti is settled by peoples of both African and European ancestry. A young couple, both with mixed ancestry, marry and have several children. The children vary widely in the amount of skin melanin production, with one child being lighter than either parent, and one being darker. The simple explanation for this is
A)non-disjunction.
B)multiple alleles.
C)environmental factors.
D)polygenic inheritance
What is polygenic inheritance.
300
A man with type A blood and a woman with type B blood have a child. If this child has type O blood, which of the following statements must be true?
A)The father could be homozygous
B)The mother has homozygous B blood type.
C)The maternal grandmother is homozygous,
D)The paternal grandmother could have type O blood.
What is the paternal grandmother could have type O blood.
300
A classical example of incomplete dominance is
A)ABO blood groups in humans.
B)height in garden peas.
C)pink flowers in heterozygous snapdragons.
D)coat color in rabbits.
What is pink flowers in heterozygous snapdragons.
300
Why did Mendel choose pea plants for his research?
A)Peas are easy to cultivate.
B)Pea plants have a short generation time.
C)Pea plants are self-pollinating but can be cross-fertilized easily.
D)Many true-breeding varieties were available.
E)All of these were important characteristics in Mendel's selection
What is pea plants are self-pollinating but can be cross-fertilized easily.
300
The symbol "F" in the results of a test cross stands for
A)father.
B)first trait to show up.
C)"faulty" or unexpected results.
D)filial.
What is filial. (having or assuming the relation of a child or offspring)
300
Which disease results in deformed red blood cells, poor circulation, anemia, and an increased resistance to malaria?
A)hereditary spherocytosis
B)sickle-cell disease
C)Huntington's disease
D)hemophilia
What is sickle-cell disease.
400
A mother cat is homozygous for long hair and yellow color, and a father cat is short-haired and white. If long hair and yellow color are dominant, what are the possible offspring the parents could have?
A)LLYY and llyy
B)LlYy
C)LLYy and llyy
D)LlYy and llyy
What is LlYy.
400
If a woman is a carrier for the color-blind recessive allele, and her husband is normal, what are their chances that a son will be color-blind?
A)none, because the father is normal
B)50%, because the mother is the only carrier
C)100%, because the mother has the gene
D)25%, because the mother is a hybrid
What is 50%, because the mother is the only carrier.
400
What aspect of Mendel's background gave him the necessary tools to discover the laws of inheritance?
A)He was a monk.
B)He was a teacher.
C)He lived in Austria.
D)He had studied mathematics and probability.
E)He corresponded with Charles Darwin.
What is he had studied mathematics and probability.
400
What is the blending theory of inheritance?
A)Mendel's theory of how traits are passed from parent to offspring.
B)Darwin's theory of how traits are passed from the parent to the offspring.
C)The modern theory of how genetic information is passed from parents to offspring.
D)A theory that describes how offspring show traits intermediate between those of the parents.
What is a theory that describes how offspring show traits intermediate between those of the parents.
400
A patient is showing symptoms of a neurological disorder. Doctors test the patient's DNA for signs of a genetic disorder. They discover an area on chromosome 4 that displays an unusually large number of repeats of the CAG triplet (which codes for glutamine). They conclude that the patient carries the gene for which disorder?
A)osteogenesisimperfecta
B)Huntington's disease
C)sickle cell anemia
D)hemophilia
What is Huntington's disease.
500
Which statement is true about X-linked characteristics?
A)More females than males are affected.
B)Males can be carriers of the gene without showing it.
C)The characteristic often skips a generation, from a woman's father to her son.
D)Males can have two copies of the alleles for the trait, but females can have only one.
What is the characteristic often skips a generation, from a woman's father to her son.
500
The ability to roll the edges of the tongue upward in a U-shape has been considered an inherited ability. The standard assumption is that tongue-rolling is a dominant allele at a single gene locus. Which of the following would cast doubt on this assumption?
A)A teacher reports that after testing her class on the ability to roll their tongues, with little effort the non-tongue-rollers can learn to roll their tongues also.
B)A student who can roll his tongue has a mother and father both of whom cannot.
C)A student who cannot roll his tongue has a mother and father both of whom can.
D)The non-tongue rollers who learn to roll their tongues and the student who can roll his tongue while his parents cannot are two situations that cast doubt on the heritability issue.
What is the non-tongue rollers who learn to roll their tongues and the student who can roll his tongue while his parents cannot are two situations that cast doubt on the heritability issue.
500
Which of the following statements accurately describes Gregor Mendel?
A)He had a strong background in mathematics.
B)He was very deliberate and followed the scientific method closely while doing his research.
C)He kept very detailed records of his research.
D)He conducted many preliminary studies with various animals and plants.
E)All of the statements accurately describe Gregor Mendel.
What is All of the statements accurately describe Gregor Mendel.
500
"T" and "t" are alleles. Which statement clarifies the definition of alleles?
A)Alleles are genes for different traits, such as hair color or eye color.
B)Alleles are alternative forms of a gene for a single trait, such as blue eyes or brown eyes.
C)Alleles are the locations of genes on a chromosome.
D)Alleles are symbols for the recessive forms of genes.
What is alleles are alternative forms of a gene for a single trait, such as blue eyes or brown eyes.
500
Some plants fail to produce chlorophyll, and this trait appears to be recessive. If we locate a plant that is heterozygous for this trait, self-pollinate it, and harvest seeds, what are the likely phenotypes of these seeds when they germinate?
A)All will be green with chlorophyll, because that is the dominant trait.
B)All will be white and lack chlorophyll, because this is self-pollinated.
C)About one-half will be green and one-half white (lack chlorophyll), because that is the distribution of the genes in the parents.
D)About one-fourth will be white (lack chlorophyll) and three-fourths green, because it is similar to a monohybrid cross.
What is about one-fourth will be white (lack chlorophyll) and three-fourths green, because it is similar to a monohybrid cross.