EBK ESSENTIALS OF GENETICS
9th Edition
ISBN: 8220102741614
Author: Palladino
Publisher: YUZU
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Textbook Question
Chapter 6, Problem 10PDQ
Inversions are said to “suppress crossing over.” Is this terminology technically correct? If not, restate the description accurately.
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What is a crossing over, and what is the purpose of it?
What kind of chromosomal mutations is/are produced by unequal crossing over?
Inversions are said to “suppress crossing over.” Is this terminologytechnically correct? If not, restate the descriptionaccurately.
Chapter 6 Solutions
EBK ESSENTIALS OF GENETICS
Ch. 6 - CASE STUDY| Fish tales Aquatic vegetation...Ch. 6 - CASE STUDY |Fish tales Aquatic vegetation...Ch. 6 - CASE STUDY |Fish tales
Aquatic vegetation...Ch. 6 - HOW DO WE KNOW? In this chapter, we focused on...Ch. 6 -
CONCEPT QUESTION
2. Review the Chapter Concepts...Ch. 6 -
3. Define these pairs of terms, and distinguish...Ch. 6 -
4. For a species with a diploid number of 18,...Ch. 6 - What explanation has been proposed to explain why...Ch. 6 - Contrast the fertility of an allotetraploid with...Ch. 6 -
7. Why do human monosomies most often fail to...
Ch. 6 -
8. Describe the origin of cultivated American...Ch. 6 - Predict how the synaptic configurations of...Ch. 6 - Inversions are said to “suppress crossing over.”...Ch. 6 -
11. Predict the genetic composition of gametes...Ch. 6 - Human adult hemoglobin is a tetramer containing...Ch. 6 -
13. The primrose, Primula kewensis, has 36...Ch. 6 - Certain varieties of chrysanthemums contain 18,...Ch. 6 - Drosophila may be monosomic for chromosome 4, yet...Ch. 6 - Mendelian ratios are modified in crosses involving...Ch. 6 -
17. Having correctly established the F2 ratio in...Ch. 6 -
18. In a cross between two varieties of corn,...Ch. 6 -
19. A couple planning their family are aware that...Ch. 6 -
20. A woman who sought genetic counseling is...Ch. 6 - The woman in Problem 20 has had two miscarriages....Ch. 6 -
22. In a recent cytogenetic study on 1021 cases...Ch. 6 -
23. A boy with Klinefelter syndrome (47,XXY) is...Ch. 6 - In a human genetic study, a family with five...Ch. 6 - A 3-year-old child exhibited some early indication...Ch. 6 - A normal female is discovered with 45 chromosomes,...
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- 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_forwardWhat is physically exchanged during crossing over?arrow_forwardNormally you cant inherit both copies of a homologous chromosome from the same parent. Why? Assuming that no crossing over has occurred, how likely is it that one of your non-sex chromosomes is an exact copy of the same chromosome your maternal grandmother had? Explain your answer.arrow_forward
- People with Down syndrome have an extra copy of chromosome 21, for a total of 47 chromosomes. However, in a few cases of Down syndrome, 46 chromosomes are present. This total includes two normal-looking chromosomes 21, one normal chromosome 14, and a longer-than-normal chromosome 14. Interpret this observation. How can these individuals have 46 chromosomes?arrow_forwardWhen is the only time crossing over can occur?arrow_forwardA woman who sought genetic counseling is found to be heterozygousfor a chromosomal rearrangement between the second andthird chromosomes. Her chromosomes, compared to those in anormal karyotype, are diagrammed on the next page:(a) What kind of chromosomal aberration is shown?arrow_forward
- Explain why a person with Klinefelter Syndrome (XXY) still exhibits abnormal phenotypes despite the fact that one of the extra X Chromosome is inactivated practically leaving an XY active sex chromosomes similar to a normal male?arrow_forwardHow does nondisjunction lead to abnormalities in chromosome number? Describe two types of genetic disorders that can result from nondisjunction.arrow_forwardHow many Barr bodies are contained within the nucleus of a person with Monosomy X? In thenucleus of a person with Trisomy X? A person with XYY syndrome? Please explain.arrow_forward
- An inversion heterozygote has the following inverted chromosome:What is the result if crossing over occurs between genes F and G onan inverted and a normal chromosome in this individual?What information do you know based on the question and your understanding of the topic?arrow_forwardFor the following chromosome complements, what is the phenotypic sex of a person who has Q. XO with a copy of the SRY gene on an autosomal chromosome?arrow_forwardAn inversion heterozygote has the following inverted chromosome:What is the result if crossing over occurs between genes F and G onan inverted and a normal chromosome in this individual?What topic in genetics does this question address?arrow_forward
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