EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: 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
Please observe the tetrad of duplicated homologous chromosomes. Have a single crossover take place involving only two of the four chromatids between the B/b alleles and the D/d alleles. The crossover must take place between non sister chromatids. What combinations of alleles are now present on the chromatids?
11
Chapter 10 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
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_forwardPlz asaparrow_forwardCan someone help with this question?arrow_forward
- 1. 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_forward#8 please!arrow_forwardCan you help?arrow_forward
- Which 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_forwardVISUALIZE 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_forward
- 13arrow_forwardSketch 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_forwardWHAT IF? Suppose this eye color gene were located on an autosome.Predict the phenotypes (including gender) of the F2 flies in this hypothetical cross.(Hint: Draw a Punnett square.)arrow_forward
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