The presence of ____ in urine indicates a pregnancy
a. estrogen
b. progesterone
c. human chorionic gonadotropin
d. follicle-stimulating hormone
e. luteinizing hormone
C
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At an autosomal gene locus in humans, the allele for brown eyes is dominant over the allele for blue eyes. At another gene locus, located on the X chromosome, a recessive allele produces colorblindness while the dominant allele produces normal color vision. A heterozygous brown-eyed woman who is a carrier of colorblindness has a child with a blue-eyed man who is not colorblind. An ultrasound test shows that the child is a girl. What is the probability that she will be colorblind? (Enter the probability as a percent. Enter the number only without the percent sign. For example, enter 100% as 100 and enter 12.5% as 12.5)
What will be an ideal response? Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about X-linked and autosomal inheritance? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
To facilitate the regulation of membrane fluidity, E. coli has the enzyme
A) bacteriorhodopsin. B) desaturase. C) fatty acid convertase. D) gangliosidase. E) unsaturase.
Which of the following are primarily responsible for cytokinesis in plant cells but not in animal cells?
A) kinetochores B) Golgi-derived vesicles C) actin and myosin D) centrioles and centromeres
Plasmodial slime molds
A) are photoautotrophic. B) are marine decomposers. C) contain many nuclei in one mass of cytoplasm. D) are primitive fungi.