In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue pigment synthesis is inhibited by a dominant allele of gene D. In other words, plants with the genotype K- D- will not produce pigment (and their flowers will be white) because of the presence of the D allele. If two dihybrid plants (Kk Dd) are crossed, what is the ratio of blue to white offspring in the progeny?
A) 3 blue: 1 white
B) 7 blue: 9 white
C) 4 blue: 12 white
D) 3 blue: 13 white
E) 1 blue: 15 white
D) 3 blue: 13 white
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In humans, hemophilia is caused by a recessive allele on the X chromosome. Suppose a man with hemophilia has children with a healthy woman whose mother had hemophilia. What is the probability that their second child will have hemophilia? (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 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?
What is the function of the generative cell in conifers?
A. Growth of the megaspore B. Dispersal of the pollen C. Production of the archegonium D. Formation of the sperm E. Maturation of the female cone
What is the function of microvilli?
a. Microvilli provide structure inside the cell to maintain its shape and support organelles. b. Microvilli allow cells to remain attached to neighboring cells in hostile environments. c. Microvilli provide cells with a larger surface area for absorbing nutrients from food. d. Microvilli provide a means of rudimentary locomotion for cells that distribute nutrients.
Where in a eukaryotic cell does oxidative phosphorylation occur?
a. Outer membrane of the mitochondria b. Inner membrane of the mitochondria c. Inner part of the cell membrane d. Throughout the cytoplasm