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Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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How does the process of crossing-over increase genetic diversity?
Select one:
a. Each gamete receives different amounts of histones
b. Each gamete receives different numbers of genes
c. Each gamete receives different numbers of chromosomes
d. Each chromosome the gamete receives can be a recombination of the two homologous parental chromosomes
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- Rainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male sperm are haploid. In the wild, when the sperm fertilizes an egg, the extra set of chromosomes is kicked out, resulting in a diploid offspring.Triploid trout are produced in the lab to provide sterile fish stock for lakes. Shortly after the eggs are fertilized, scientists place them in a warm water bath to prevent the extra chromosomes from being removed. The result is a triploid fish that cannot reproduce.Rainbow Trout: n = 30Select the row that correctly shows the ploidy for the trout at different reproductive stages. Select one: a. Female Egg Male Sperm Offspring Produced in wild Offspring Produced in lab n = 30 2n = 60 3n = 90 2n = 60 b. Female Egg Male Sperm Offspring Produced in wild Offspring Produced in lab 2n = 60 n = 30 2n = 60 2n = 60 c. Female Egg Male Sperm Offspring Produced in wild Offspring Produced in lab 2n = 60 n = 30…arrow_forwardRainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male sperm are haploid. In the wild, when the sperm fertilizes an egg, the extra set of chromosomes is kicked out, resulting in a diploid offspring.Triploid trout are produced in the lab to provide sterile fish stock for lakes. Shortly after the eggs are fertilized, scientists place them in a warm water bath to prevent the extra chromosomes from being removed. The result is a triploid fish that cannot reproduce.Rainbow Trout: n = 30 Global warming is an issue affecting many species around the world. Warming has caused the temperatures in lakes and rivers to increase and stay elevated for longer periods of time. Select the FOUR numbers that describe the possible effects of global warming on the reproduction of rainbow trout in the wild and on biodiversity. The extra set of chromosomes remains. The extra set of chromosomes is removed. The offspring are diploid (2n). The offspring are triploid…arrow_forward. With regards to the grasshopper testes experiment, diakinesis is an ideal stage to determine chromosome number due to the degree of condensation of the chromosomes? Count the chromosomes at this stage. Does it represent a diploid or a haploid number?arrow_forward
- The bananas you purchase in the grocery store in the United States, are the product of asexual propagation methods. Which of these processes produces genetic variation in the bananas that you eat with your breakfast cereal? Select all that apply. A.) Crossing-over B.) Independent assortment C.) Mutationarrow_forwardAre mules sterile because they are hybrids of two different species or because they have an odd number of chromosomes?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
- Which of the following statements are true regarding homologous pairs of chromosomes? Select all that apply. A. They are the same size B. Their prescence indicates a cell is a diploid C. They are identical copies of one another D. One of the homologous chromosomes in a set is synthesized during S phase E. They line up next to each other during metaphase I of meiosis F. They are separated in anaphase I of meiosisarrow_forwardConsider three genes: X, Y, and Z. The X and Y genes are on the same chromosome; gene Y is on a different chromosome. An organism is heterozygous for all three genes. The cell’s parents were both homozygous for all three genes. This organism produces a gamete with the dominant X allele. Which of the following is true of this gamete? A. It is likely to have both the dominant Y and Z alleles. B. It is likely to also have the dominant Y allele but not necessarily the dominant Z allele. C. It is likely to also have the dominant Z allele but not necessarily the dominant Y allele. D. It is not more likely to have either the dominant Y or dominant Z alleles.arrow_forward
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