Biology, 27.11.2019 02:31, sduhaime1974
During prometaphase, the microtubules of the mitotic spindle attach only to the kinetochore of a single sister chromatid and not to the other for the maternal copy of chromosome 21. what will happen to the copy number of chromosome 21 in the resulting daughter cells?
a. one of the daughter cells is missing both copies of chromosome 21 and the other cell has four copies of chromosome 21.
b. both daughter cells have double the normal number of chromosome 21 (four copies each).
c. one of the daughter cells has trisomy (three copies) of chromosome 21 and the other daughter cell is missing one of the two copies of chromosome 21.
Answers: 1
Biology, 21.06.2019 21:00, ashleyp2249
List two modern organisms that have pentameral symmetry
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Biology, 22.06.2019 03:00, Braxtonw875
In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait. mating two of the f1 fish fails to produce females with the trait. explain the inheritance pattern of the trait.
Answers: 3
Biology, 22.06.2019 13:00, Brooke7644
In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.
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Biology, 22.06.2019 15:30, sandeebassett3
Everything in the universe originated from a single point. how was it possible for everything in the universe to have occupied a single point in space?
Answers: 2
During prometaphase, the microtubules of the mitotic spindle attach only to the kinetochore of a sin...
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