ESSENTIALS OF GENETICS ALC & MOD MSTG/ET VP
1st Edition
ISBN: 9780134452890
Author: KLUG
Publisher: Pearson Education
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Chapter 2, Problem 18PDQ
Summary Introduction
To review:
The probability that in anorganism (haploid number of chromosomes or n is10), a spermformed will contain all 10 chromosomes, withcentromeres derived from maternal homologs.
Introduction:
Meiosis is the process of cell division, in which a single cell dividesinto two phases and it leadsto the production of four daughter cells. The daughter cells contain half the amount of parental cell’s genetic information. Meiosis occurs during the formation of gametes (a sperm and an egg).
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What is the probability that, in an organism with a haploid number of 10, a sperm will be formed that contains all 10 chromosomes whose centromeres were derived from maternal homologs?
Though an individual with abberations such as Robertsonian translocation may be phenotypically normal, they can generate gametes through meiosis that have atypical organizations of chromosomes, resulting in recurrent fetal abnormalities or miscarriages. Why, despite these Robertsonian translocations, are affected cells still able to generate typical gametes through meiosis?
If these segregation patterns are equally likely, what is the probability that a gamete produced by the individual who carries the translocatedchromosome will result in a viable offspring with a normal phenotype?
Chapter 2 Solutions
ESSENTIALS OF GENETICS ALC & MOD MSTG/ET VP
Ch. 2 - CASE STUDY | Timing is everything A man in his...Ch. 2 - CASE STUDY | Timing is everything A man in his...Ch. 2 - CASE STUDY | Timing is everything A man in his...Ch. 2 -
HOW DO WE KNOW?
1. In this chapter, we focused...Ch. 2 -
2. Review the Chapter Concepts list on page 12....Ch. 2 - What role do the following cellular components...Ch. 2 -
4. Discuss the concepts of homologous...Ch. 2 - If two chromosomes of a species are the same...Ch. 2 - Describe the events that characterize each stage...Ch. 2 - How are chromosomes named on the basis of their...
Ch. 2 - Prob. 8PDQCh. 2 -
9. Describe the phases of the cell cycle and the...Ch. 2 - Define and discuss these terms: (a) synapsis, (b)...Ch. 2 - Prob. 11PDQCh. 2 - Prob. 12PDQCh. 2 - Contrast spermatogenesis and oogenesis. What is...Ch. 2 -
14. Explain why meiosis leads to significant...Ch. 2 -
15. A diploid cell contains three pairs of...Ch. 2 - Prob. 16PDQCh. 2 -
17. During oogenesis in an animal species with a...Ch. 2 - Prob. 18PDQCh. 2 -
19. During the first meiotic prophase, (a) when...Ch. 2 -
20. Describe the role of meiosis in the life...Ch. 2 - Prob. 21PDQCh. 2 - Prob. 22PDQCh. 2 - Prob. 23PDQCh. 2 -
24. If one follows 50 primary oocytes in an...Ch. 2 -
25. The nuclear DNA content of a single sperm...Ch. 2 - For Problems 26–31, consider a diploid cell that...Ch. 2 - For Problems 26–31, consider a diploid cell that...Ch. 2 - For Problems 26–31, consider a diploid cell that...Ch. 2 -
For Problems 26–31, consider a diploid cell that...Ch. 2 - For Problems 26–31, consider a diploid cell that...Ch. 2 - For Problems 26–31, consider a diploid cell that...
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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
- Human 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_forwardHow does crossing-over affect the genetic content of the haploid gametes?arrow_forwardWhich, if any, of the following sex-chromosome aneuploids in humans are fertile: XXX, XXY, XYY, XO?arrow_forward
- If the original parental cell had 12 pairs of homologous chromosomes, how many chromosomes would be in each gamete at the end of telophase II?arrow_forwardIf the G locus were 50 or more map units from the centromere, what types and proportions of gametes would the F1 be expected to produce? Derive the expected F2 genotypic and phenotypicarrow_forwardA normal mother has translocations on chromosomes 14:21. With respect to chromosomes 14:21, how many combinations of chromosomes are possible? How many gametes are viable? If the woman has children with an normal father, what is the probability that there is a daughter with Down Syndrome or a son with an unaffected phenotype?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_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. Draw the pairing arrangement of these chromosomes in prophase I of meiosis.arrow_forwardWhy are people with balanced chromosomal translocations phenotypically normal? Do they suffer from reduced fertility? Why?arrow_forward
- Why are the homologous regions of the X and Y chromosome important during meiosis?arrow_forward. In a diploid organism of 2n = 10, assume that you canlabel all the centromeres derived from its female parentand all the centromeres derived from its male parent.When this organism produces gametes, how many maleand female-labeled centromere combinations are possible in the gametes?arrow_forwardConsider three pairs of homologous chromosomes with centromere labeled A/a, B/B, C/c. How many kinds of meiotic products can this individual produce?arrow_forward
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