Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 11.2, Problem 2SB
Consider an animal with six pairs of chromosomes; one set of six chromosomes is from this animal’s male parent, and the homologous set of six chromosomes is from this animal’s 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?
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Female flies with white eyes and miniature wings (both X-linkedrecessive traits) were crossed to male flies with red eyes and longwings. On rare occasions, female offspring were produced withwhite eyes. If we assume these females are due to errors in meiosis, what would be the most likely chromosomal composition ofsuch flies? What would be their wing length?
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 equals the number of chromosomes in a set, which of the following expressions can be used to calculate the probability that a gamete will receive all of the paternal chromosomes: (1/2)n, (1/2)n–1, or n1/2?
In translocation heterozygotes, two nonhomologous chromosomes exchanged some genetic information. The translocation affects the
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indicate nonhomologous chromosomes (or segments derived from them). Drag each description to the set of gametes it correctly
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Genetically balanced
gamete that can be
produced by a
translocation
heterozygote.
Genetically unbalanced
gamete that can be
produced by a
translocation
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Gamete that cannot be
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Chapter 11 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 11.1 - How does the outcome to meiosis differ from that...Ch. 11.1 - Prob. 2SBCh. 11.1 - Prob. 3SBCh. 11.2 - Prob. 1SBCh. 11.2 - Consider an animal with six pairs of chromosomes;...Ch. 11.3 - Prob. 1SBCh. 11 - The chromosome constitution number of this...Ch. 11 - Which of the following is not associated with...Ch. 11 - Chiasmata: a. form during metaphase II of meiosis....Ch. 11 - If 2n is four, the number of possible combinations...
Ch. 11 - Prob. 5TYKCh. 11 - The DNA content in a diploid cell in G2 is X. If...Ch. 11 - Metaphase in mitosis is similar to what stage in...Ch. 11 - In the human sperm: a. there must be one...Ch. 11 - In plants, the adult diploid individuals are...Ch. 11 - Prob. 10TYKCh. 11 - Discuss Concepts You have a technique that allows...Ch. 11 - Discuss Concepts One of the human chromosome pairs...Ch. 11 - Prob. 13TYKCh. 11 - Prob. 14TYKCh. 11 - Prob. 15TYKCh. 11 - Prob. 1ITDCh. 11 - Prob. 2ITD
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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
- The chromosomes in the illustration below are found in a male betta fish and carry the gene for determining a trait in the tail of the betta fish. In betta fish, single tails are domi- nant to double tails. During meiosis, when gametes are formed, the male fish can only pass on one allele for the tail trait to each gamete. In a male fish that happens to be heterozy- gous, a gamete can only inherit the dominant allele on chromosome 1 or the dominant al- lele on chromosome 2. A An illustration of paired homologous chromosomes. B centromere с D Which of Mendel's laws best explains how the male fish can only pass on one allele to each gamete? paired homologous chromosomes Law of Independent Assortment Law of Segregation Law of Dominance chiasma Law of multiple alleles homologous chromosome 1 homologous chromosome 2arrow_forwardA diploid organism produces four gametes from one parent cell through the process of meiosis. Two gametes are found to have 7 chromosomes and two gametes are found to have 5 chromosomes. A) Is this the expected number of chromosomes that would be found in each gamete following a normal cycle of meiosis? If yes, explain why. If no, explain why not and describe how the gamete situation described above occurred. B) Determine the number of homologous chromosome pairs that the original parent cell contained, before meiosis began. Explain how you determined this value.arrow_forwardA normal diploid version of a plant species has 2n = 18 chromosomes. How many chromosomes would you expect to find in a tetrasomic individual of this species?arrow_forward
- In 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_forwardAn individual heterozygous for a reciprocal translocation possesses the following chromosomes: A B • C D E F G A B • C D V W X R S • T U E F G R S • T U V W X Q. Diagram the alternate, adjacent-1, and adjacent-2 segregation patterns in anaphase I of meiosis.arrow_forwardConsidering an organism with three pairs of homologous chromosomes, how many different kinds of gametes can this organism produce based on different chromosomal arrangements? Assume that the members of each pair are not identical?arrow_forward
- An individual is heterozygous for a reciprocal translocation, with the following chromosomes: A • B C D E F A • B C V W X R ST • U D E F R ST • U V W X Q. Draw a picture of these chromosomes pairing in prophase I of meiosis.arrow_forwardDiagram the types of gametes you would expect from a ++/yw female, given no crossovers, one crossover, two crossovers, three crossovers, and fours crossovers between bonsister chromatids of homologous chromosomes?arrow_forwardHuman sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele? c. If a female is heterozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele?arrow_forward
- Assume that a meiotic-nondisjunction event causes trisomy 8 in a newborn. If two of the three copies of chromosome 8 are absolutely identical, at what point during meiosis did the nondisjunction event take place?arrow_forwardHuman females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X-linked alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele?arrow_forwardIn mammals, there are two sex chromosomes, X and Y, which behave like homologous chromosomes during meiosis. Normal males have one X chromosome and one Y chromosome, and normal females have two X chromosomes. Males with an extra Y chromosome (XYY) occasionally are found due to inappropriate segregation of the chromosomes (i.e. non-disjunction). Which of the following could give rise to such an XYY male? Answer Yes or No for each situation. nondisjunction in the first meiotic division of spermatogenesis; normal meiosis in the mother nondisjunction in the second meiotic division of spermatogenesis; normal meiosis in the mother nondisjunction in the first meiotic division of oogenesis; normal meiosis in the father nondisjunction in the second meiotic division of oogenesis; normal meiosis in the fatherarrow_forward
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