Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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How many chromosomes would be found in somatic cells of an allotetraploid plant if its parent species had diploid (2n) numbers of 4 and 6 respectively?
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- Here is a strawberry karyotype - ignore the different colours. How many chromosomes are shown in the figure? What is the ploidy of this type of strawberry? How many alleles could an individual strawberry have at each locus? Finally during the G2 stage of cell division, how many double helixes would be in this picture if you drew them over the chromosomes? Many domesticated plants are polyploid - give one possible reason why this might be the case, with a focus on using genetic principles to reason it out (i.e., you don't have to be right per se, you have to build an argument based on what you've already learned).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
- During meiosis, when crossing-over occurs between two homologous chromosomes, it does not happen at a single point, but rather two points with a stretch of DNA in between. What are the two junction points called?What is the region between the two points called and what is different about this region compared to how double-stranded DNA usually is?If the region described in b.) is located within a gene and the two homologues have different alleles of this gene, what might happen that is a direct violation of Mendel’s first law? (Describe the process with 2-3 sentences of detail.)arrow_forwardWhat do you mean by heterogametic? Give example?arrow_forwardDiploid = 2n with n being # of chromosomes so, a) Haploid = n b) Haploid = 3narrow_forward
- Draw a diagram of meiosis in a cell where 2n = 6, in a case where there is interchromosomal mixing. Use a clearly labelled colour code (what does each colour represent?) to represent the chromosomes.arrow_forwardWhat will be the number of chromosomes in Turner’s syndrome and Klinefelter's syndrome of an organism whose haploid number is 20arrow_forwardHow do you determine the amount of DNA picograms for each stage in Meiosis? (for a cell 2n=4 for reference)arrow_forward
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