The pedigree chart below is for a family, some of whose members exhibit the recessive trait, wooly hair. Affected individuals are indicated by an open square or circle. Use the chart to answer the following question.
What is the likelihood that the progeny of D-3 and D-4 will have wooly hair?
B.
The pedigree chart below is for a family, some of whose members exhibit the recessive trait, wooly hair. Affected individuals are indicated by an open square or circle. Use the chart to answer the following question.
What is the genotype of individual B-5?
A.
An achondroplastic male dwarf with normal vision marries a color-blind woman of normal height. The man's father was six-feet tall, and both the woman's parents were of average height. Achondroplastic dwarfism is autosomal dominant, and red-green color blindness is X-linked recessive. They have a daughter who is a dwarf with normal color vision. What is the probability that she is heterozygous for both genes?
D.
An achondroplastic male dwarf with normal vision marries a color-blind woman of normal height. The man's father was six-feet tall, and both the woman's parents were of average height. Achondroplastic dwarfism is autosomal dominant, and red-green color blindness is X-linked recessive. How many of their daughters might be expected to be color-blind dwarfs?
A.
An achondroplastic male dwarf with normal vision marries a color-blind woman of normal height. The man's father was six-feet tall, and both the woman's parents were of average height. Achondroplastic dwarfism is autosomal dominant, and red-green color blindness is X-linked recessive. How many of their sons would be color-blind and of normal height?
C.
The dynamics of any ecosystem include the following major processes:
E.
The signal transduction pathway in animal cells that use epinephrine
C.
If the liver cells of an animal have 24 chromosomes, how many chromosomes do its sperm cells have?
B.
Which of the following would be inhibited by a drug that specifically blocks the addition of phosphate groups to proteins?
C.
Which of the following statements about Mendel's breeding experiments is correct?
D.
In a particular plant, leaf color is controlled by gene D. Plants with the dominant allele D have dark green leaves, and plants with the homozygous recessive dd genotype have light green leaves. A true-breeding dark-leaved plant is crossed with a light-leaved one, and the F1 offspring is allowed to self-pollinate. The predicted outcome of this cross is diagrammed in the Punnett square shown below, where 1, 2, 3, and 4 represent the genotypes corresponding to each box within the square.
Which of the boxes marked 1-4 correspond to plants with dark leaves?
D.
In a particular plant, leaf color is controlled by gene D. Plants with the dominant allele D have dark green leaves, and plants with the homozygous recessive dd genotype have light green leaves. A true-breeding dark-leaved plant is crossed with a light-leaved one, and the F1 offspring is allowed to self-pollinate. The predicted outcome of this cross is diagrammed in the Punnett square shown below, where 1, 2, 3, and 4 represent the genotypes corresponding to each box within the square.
Which of the plants will be true-breeding?
A.
In a particular plant, leaf color is controlled by gene D. Plants with the dominant allele D have dark green leaves, and plants with the homozygous recessive dd genotype have light green leaves. A true-breeding dark-leaved plant is crossed with a light-leaved one, and the F1 offspring is allowed to self-pollinate. The predicted outcome of this cross is diagrammed in the Punnett square shown below, where 1, 2, 3, and 4 represent the genotypes corresponding to each box within the square.
Which of the boxes correspond to plants with a heterozygous genotype?
D.
A cross between homozygous purple-flowered and homozygous white-flowered pea plants results in offspring with purple flowers. This demonstrates
D.
The following question consists of five phrases or sentences related to the control of cell division. Select the term below that is most closely related to it.
triggers the cell's passage past the G2 checkpoint into mitosis
a. A
b. B
c. C
d. D
e. E
A.
The following question consists of five phrases or sentences related to the control of cell division. Select the term below that is most closely related to it.
a general term for enzymes that activate or inactivate other proteins by phosphorylating them
a. A
b. B
c. C
d. D
e. E
E.
The following question consists of five phrases or sentences related to the control of cell division. Select the term below that is most closely related to it.
A. PDGF
B. MPF
C. protein kinase
D. cyclin
E. Cdk
a protein synthesized at specific times during the cell cycle that associates with a kinase to form a catalytically active complex
a. A
b. B
c. C
d. D
e. E
D
The following is a map of four genes on a chromosome:
Between which two genes would you expect the highest frequency of recombination?
E.
What is a karyotype?
D.
A cell divides to produce two daughter cells that are genetically identical.
E.
As a result of photosynthesis, plants release ____ into the atmosphere.
D.
Prokaryotic and eukaryotic cells generally have which of the following features in common?
D.
What is genetic cross between an individual showing a dominant phenotype (but of unknown genotype) and a homozygous recessive individual called?
D.
The human X and Y chromosomes are
D.
When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation included both red- and white-eyed flies. Remarkably, all the white-eyed flies were male. What was the explanation for this result?
C.
A Barr body is normally found in the nucleus of which kind of human cell?
C.
If cells in the process of dividing are subjected to colchicine, a drug that interferes with the functioning of the spindle apparatus, at which stage will mitosis be arrested?
D.
Homologous chromosomes synapse and crossing over occurs.
D.
From the perspective of the cell receiving the message, the three stages of cell signaling are
A.
A water sample from a hot thermal vent contained a single-celled organism that lacked a nucleus. What is its most likely classification?
C.
Centromeres uncouple and chromatids are separated from each other.
C.
The chemical reactions within cells are regulated by organic catalysts called
A.
Use the data in the table below to answer the following question.
The data were obtained from a study of the length of time spent in each phase of the cell cycle by cells of three eukaryotic organisms designated beta, delta, and gamma.
The best conclusion concerning delta is that the cells
A.
Use the data in the table below to answer the following question.
The data were obtained from a study of the length of time spent in each phase of the cell cycle by cells of three eukaryotic organisms designated beta, delta, and gamma.
Of the following, the best conclusion concerning the difference between the S phases for beta and gamma is that
D.
Red-green color blindness is a sex-linked recessive trait in humans. Two people with normal color vision have a color-blind son. What are the genotypes of the parents?
