Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 10.4, Problem 2CC
WHAT IF? If maternal and paternal chromatids have the identical two alleles for every gene, will crossing over lead to
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In flies, long wings are a dominant trait, and short wings are a recessive trait. Medium wings are the heterozygous
trait. Based on this information, if a homozygous long-winged fly is crossed with another a heterozygous'fly, their
offspring will have which percentages for long, medium, and short wings? Assume random chromosome segregation.
17)
A)
25% long, 75% medium, 0% short
B)
50% long, 25% medium, 25% short
50% long, 50% medium, 0% short
D)
100% medium, 0% long, 0% short
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Chapter 10 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 10.1 - MAKE CONNECTIONS Using what you know of gene...Ch. 10.1 - How does an asexually reproducing eukaryotic...Ch. 10.1 - WHAT IF? A horticulturalist breeds orchids, trying...Ch. 10.2 - Prob. 2CCCh. 10.2 - Prob. 3CCCh. 10.2 - WHAT IF? A certain eukaryote lives as a...Ch. 10.3 - WHAT IF? After the synaptonemal complex...Ch. 10.4 - Prob. 1CCCh. 10.4 - WHAT IF? If maternal and paternal chromatids have...Ch. 10 - A human cell containing 22 autosomes and a Y...
Ch. 10 - Homologous chromosomes move toward opposite poles...Ch. 10 - If the DNA content of a diploid cell in the G1...Ch. 10 - Prob. 4TYUCh. 10 - DRAW ITThe diagram shows a cell in meiosis. (a)...Ch. 10 - Prob. 7TYUCh. 10 - SCIENTIFIC INQUIRY The diagram in question 5...Ch. 10 - Prob. 9TYUCh. 10 - Prob. 10TYUCh. 10 - Prob. 11TYU
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Discuss Concepts One of the human chromosome pairs carries a gene that influences eye color. In an individual human, one chromosome of this pair has an allele of this gene that contributes to the formation of blue eyes. The other chromosome of the pair has an allele that contributes to brown eye color (other genes also influence eye color in humans). After meiosis in the cells of this individual, what fraction of the nuclei will carry the allele that contributes to blue eyes? To brown eyes?arrow_forward1. If the two sister chromatids are the same, how are they called? 2. Which specific parts exchanged genetic information during cross over? 3. What is crossing over? 4. When will crossing over occurs? Why? 5. What will happen after crossing over? 6. How do meiosis contributes to genetic variation, while mitosis does not? 7. Why is crossing over important for evolution of species? V. Conclusion:arrow_forwardplease help?arrow_forward
- #8 please!arrow_forwardWhich is true about crossing over?arrow_forwardHomologous Chromosomes We have discussed homologous chromosomes before. This idea is essential to the understanding of genetics, so we will review it again. Information • Very simple organisms have only one set of chromosomes and they are haploid. ► More complex organisms have two sets of chromosomes and are diploid. • Haploid organisms have one of each kind of chromosome and one of every kind of gene. Diploid organisms have two of each kind of chromosome and two of kind of gene. every The two chromosomes of each kind in a diploid organism are called homologous chromosomes because they are carrying the same kind of traits (genes). Homo means "same." ► A human has 23 different kinds of chromosomes that are given numbers from 1 to 23. Because we are diploid organisms we have two of each of the different kinds. So, we have 46 chromosomes in all, made up of 23 homologous pairs. ? QUESTION 1. How many sets of DNA molecules or chromosomes does a diploid organism have? 2. How many sets of DNA…arrow_forward
- VISUALIZE Sketch a series of diagrams showing each of the following, making sure to end each series with haploid cells: (a)How a pair of alleles for a single locus segregate in meiosis (b)How the alleles of two unlinked loci assort independently in meiosis (c)How the alleles of two linked loci undergo genetic recombinationarrow_forward13arrow_forward2arrow_forward
- | The Role of Meiosis Key Idea: There are two types of cell division in eukaryotes, mitosis and meiosis, but only meiosis produces cells that are genetically different to the parent cell. New cells are formed when existing cells divide. There are two forms of cell division in eukaryotes, mitosis and meiosis. Mitosis produces two identical daughter cells from a parent cell. Meiosis is a special type of cell division, and produces sex cells (gametes or spores) for sexual reproduction. In sexual reproduction, sex cells from two parents combine to form an individual that is genetically different to its parents. The sex cells in humans, called eggs and sperm, are produced by meiosis. Events occurring during meiosis creates gametes with unique combinations of gene variants and so creates genetic variability. Sexual reproduction rearranges and reshuffles the genetic material into new combinations. This is why family members may look similar, but they'll never be identical (except for…arrow_forwardThx!arrow_forwardF₁ generation 1. Parents with the following homozygous genotypes for both traits were crossed in order to produce F₂ offspring. RRSS x rrss (Purple, Smooth) x (yellow, wrinkled) What types of gametes can each parent produce? RRSS rrss (Remember how we determine gamete combinations of genes located in non-homologous chromosomes) The gametes produced by the Purple, Smooth parent would be: RS RS RS RS First R and first S First R and second S Second R and first S = Second R and second S = The gametes produced by the yellow, wrinkled parent would be: First r and first s rs First r and second s Second r and first s Second r and second s rs rs rs 2. In the space provided below, make a Punnett Square using these parents. Determine the possible types of offspring (F₁ generation), and answer the following questions: What are the genotypes of the F₁ generation?__ What are the phenotypes of the F₁ generation?arrow_forward
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