Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Textbook Question
Chapter 10.3, Problem 2CC
WHAT IF? After the synaptonemal complex disappears, how would any pair of homologous chromosomes be associated if crossing over did not occur? What effect might this have on gamete formation?
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WHAT IF? A chicken has 78 chromosomes in its somaticcells. How many chromosomes did the chicken inheritfrom each parent? How many chromosomes are in eachof the chicken’s gametes? How many chromosomes willbe in each somatic cell of the chicken’s offspring?
WHAT IF? Propose a possible reason that the firstnaturally occurring mutant fruit fly Morgan sawinvolved a gene on a sex chromosome and was foundin a male.
1. What happens during crossing over? Why is “recombination” an alternative term for what happens during the process of crossing over? Does it occur during mitosis? If so, when? If not, explain why not. Does crossing over occur during meiosis? If so, when? If not, explain why not. How does crossing over influence the genetic diversity of gametes?
Chapter 10 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for 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
- Think about the alignment of tetrads on the metaphase plate during meiosis I. What is meant by the statement that full siblings “ON AVERAGE” share 50% of their DNA? Could two siblings from the same parents share more or less than 50% of their DNA? How?arrow_forwardDiscuss 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_forwardA woman with normal chromosomes mates with a man who also has normal chromosomes. Q.What chromosome combinations and numbers of Barr bodies would you expect to see if the chromosomes separate normally in oogenesis, but nondisjunction of the sex chromosomes takes place in meiosis I of spermatogenesis?arrow_forward
- Q1: Is this the karyotype of a male or a female? Q2: How would the karyotype of a person with Down syndrome differ from this karyotype? Q3: The size of a chromosome correlates roughly with the number of genes residing on it. Why are an extra copy of chromosome 21 and a missing Y chromosome two of the least damaging chromosomal abnormalities?arrow_forwardWHAT IF? If maternal and paternal chromatids havethe same two alleles for every gene, will crossing overlead to genetic variation?arrow_forwardQ1: What are the odds that a given egg cell will contain an X chromosome? A Y chromosome? What are those odds for a sperm cell? Q2: If a couple has two daughters, does that mean their next two children are more likely to be sons? Explain your reasoning. (Hint: Refer back to “What Are the Odds?” on page 124.) Q3: Sisters share the same X chromosome inherited from their father, but they may inherit different X chromosomes from their mother. What is the probability that brothers share the same Y chromosome? What is the probability that brothers share the same X chromosome?arrow_forward
- Consider an animal with six pairs of chromosomes; one set of six chromosomes is from this animals male parent, and the homologous set of six chromosomes is from this animals female parent. How many combinations of chromosomes are possible in the gametes of an individual of this species if we look onlyat independent assortment of chromosomes, disregarding the effect of crossing-over?arrow_forwardURGENT PLZ HELP If you ignore the effect of crossing over, would you expect differences in the genetic information between a spermatid and the secondary spermatocyte from which it was derived? Explain your answer completely.arrow_forwardQuestion - Predict the types of gametes that are formed if non-disjunction of the X chromosomeoccurs in the 1st division. Click on all the different possible gamete types of sperm that could be formed (in terms of the X and Y chromosome, assume that the gamete is normal, having one of all the other chromosome types). X (normal) Y (normal) no X or Y (abnormal) XY (abnormal) YY (abnormal) XX (abnormal)arrow_forward
- 9. what is Protein aggregations along the synaptonemal complex that are thought to play a role in crossing over?arrow_forward13.Which among the following statements is INCORRECT? A. All statements are correct B.Only one of the two gene copies present in an organism is distributed to each gamete (egg cell / sperm cell) because of the separation of homologous chromosomes and sister chromatids during meiosis. C. If a cross produces 100% heterozygous genotype, then all of the offspring will exhibit the dominant allele D.The arrangement of chromosomes in metaphase I and metaphase II in Meiosis is not random, therefore, the inheritance of a trait will not affect the inheritance of the other traitarrow_forwardC13. A cell has four pairs of chromosomes. Assuming that crossing over does not occur, what is the probability that a gamete will contain all of the paternal chromosomes? If n is the number of chromosomes in a set, which of the following expressions can be used to calculate the chromosomes: (1/2)^n, (1/2)^n-1, or n^1/2?arrow_forward
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