Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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A heterozygous diploid yeast Aa Bb went through meiosis. What percentage of the haploid spores will have recombinant combinations of alleles?
What if genes A and B are unlinked? Explain
What is genes A and B are linked? Explain
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- An organism has a diploid number of 16 in a primaryoocyte. How many monads migrate to each pole during anaphase II?arrow_forwardChewbacca from Starwars is a part of a species that has 64 chromosomes for its diploid number. What would it haploid number be?arrow_forwardThe long-nosed cusimanse is a diploid organism with n=18. According to wikipedia, the cusimanse has a weasel-shaped body with dark or reddish brown fur and weighs ~2 lbs at maturity. Laotia For each of the following, indicate the total number of chromosomes, the number of pairs of homologous chromosomes and the number of pairs of sister chromatids. Indicate if the cell in question is diploid or haploid and if the daughter cell will be diploid or haploid. A. A non-dividing skin cell Total number of chromosomes: Number of pairs of homologous chromosomes: Number of pairs of sister chromatids: boxe Diploid or haploid? B. A cell is metaphase of mitosis: Total number of chromosomes: Number of pairs of homologous chromosomes: Number of pairs of sister chromatids: Diploid or haploid? Daughter cell diploid or haploid? C. Cell in prophase meiosis I: Total number of chromosomes: Number of pairs of homologous chromosomes: Number of pairs of sister chromatids: Diploid or haploid? Daughter cell…arrow_forward
- A diploid plant is heterozygous for two linked genes, A and B. Crossovers between the two genes occurs in ~10% of meiosis. Multiple crossovers are never observed in one cell undergoing meiosis. What fraction of the gametes produced by this diploid plant are expected to be recombinant type? O 5% O 10% 2.5% 25%arrow_forwardWhich are the three tetrad types produced by meiosis of dihybrid yeast?arrow_forwardIn 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_forward
- Match each box to one of the descriptionsarrow_forwardIn a wild-type fungus, protein E (encoded by the haplosufficient gene E) normally dimerizes to catalyzes a biochemical reaction necessary for the production of a dark pigment. Ed represents a mutant, dominant negative allele of gene E. What is the predicted phenotype of a fungus cell of genotype E*/Ed, and why? O wild type (normal production of the dark pigment), as E is haplosufficient mutant (no pigment production), as no dimers will form in the heterozygous mutant (no pigment production), as the mutant allele Eg is dominant O wild type (normal production of the dark pigment), as dimers of wild-type and mutant protein E will be formed in the heterozygousarrow_forwardAssume that the diploid number of a certain species is four chromosomes, two large and two small (2n=4). a) Of the following figures, which represents a 3n (triploid) cell in mitotic metaphase? b) For each of the wrong answers from part (a) above, explain briefly why it cannot represent a triploid cell in mitotic metaphase.arrow_forward
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