Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Please explain the outcomes of nondisjunction in meiosis one versus nondisjunction in meiosis two, in terms of the effect on the gametes. Please give an example of a defect that results from nondisjunction in meiosis.
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- List 2 events that occur during the process of meiosis that lead to genetically unique daughter cells (gametes).arrow_forwardPlease explain what would be the consequences in successive generations of offspring if the chromosome number were not reduced during meiosis?arrow_forwardAre there any factors that can cause an increase in the risk of developing an error in the meiotic division; if so, what are they? The duplication or depletion of a chromosome carries various health risks; what error in the chromosomes would be least harmful and what would be the most harmful for the zygote?arrow_forward
- explain the Nondisjunction during second meiotic divisionarrow_forwardWhich of the following would not be an example of a quantitative trait? O All of these are quantitative O Polydactyly in chimps O Birth body length of dalmatians O Weight of humpback whales O Blood pressure in black bearsarrow_forwardHow do we know if Nondisjunction occurs in meiosis one or two?arrow_forward
- In fruit flies, chromosomal crossing over does not occur in meiosis in males, whereas crossing over does occur in meiosis in females. In fruit flies that are heterozygous at many genes (i.e. many maternal and paternal versions of the genes differ), at what stage would cells no longer be heterozygous for any gene during the process of meiosis? a)After the second meiotic division in males, and after the first meiotic division in females. b)After the second meiotic division in both males and females. c)After the first meiotic division in both males and females. d)After the first meiotic division in males, and after the second meiotic division in females.arrow_forwardWhat type of gametes can be produced by simple non-disjunction of the sex chromosomes in a human male? Simple non-disjunction means that non-disjunction occurs in meiosis I or meiosis II, but not in both meiosis I and meiosis II. Choose all answers that are correct Group of answer choices 22, 0 24, YY 25, XXY 23, XX 23, XY 25, XXX 24, XY 24, XXarrow_forward
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