It becomes possible to predict evolutionary changes in a population after we have measured two attributes affecting the population in question. What two measures allow us to make such predictions?
What will be an ideal response?
heritable variation; strength of selection
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Non-disjunction is the failure of homologous chromosomes to separate during meiosis I, or the failure of sister chromatids to separate during meiosis II or mitosis. As a result, both homologous chromosomes or both sister chromatids migrate to the same pole of the cell. This produces daughter cells with an imbalance of chromosomes. If 18 pairs of sister chromatids segregate normally during meiosis II in cats (n=19) but we have non-disjunction of 1 pair, then at the end of meiosis II we will have
A. 3 cells with 20 chromosomes and 1 cell with 18. B. 2 cells with 20 chromosomes and 2 cells with 18. C. 2 cells with 19 chromosomes, 1 with 20, and 1 with 18. D. 3 cells with 18 chromosomes and 1 cell with 20. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about non-disjunction? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most 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?
There are two different mating types in the yeast Saccharomyces cerevisiae, and they can switch from one type to another
Indicate whether the statement is true or false.
Which two structures (found in different organisms) both serve to increase the absorptive surfaces of the intestines?
a. choanocytes and gastric ceca b. choanocytes and proventriculus c. proventriculus and villi d. typhlosoles and gastric ceca e. typhlosoles and villi
If the frequency of hemophilia, an X-linked recessive disease, is 10% in males, what is the frequency of females with hemophilia (assuming that the population is in Hardy-Weinberg equilibrium)?
What will be an ideal response?