Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 18, Problem 1CT
Normally you can’t 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.
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Chapter 18 Solutions
Human Biology (MindTap Course List)
Ch. 18 - Prob. 1RQCh. 18 - Prob. 2RQCh. 18 - Prob. 3RQCh. 18 - Name the four main stages of mitosis, and describe...Ch. 18 - Prob. 5RQCh. 18 - Prob. 6RQCh. 18 - Prob. 1SQCh. 18 - Prob. 2SQCh. 18 - Prob. 3SQCh. 18 - Prob. 4SQ
Ch. 18 - Prob. 5SQCh. 18 - After mitosis, each daughter cell contains genetic...Ch. 18 - All of the following are stages of mitosis except...Ch. 18 - Prob. 8SQCh. 18 - Prob. 9SQCh. 18 - Because of the ________ alignment of homologous...Ch. 18 - Match the stage of mitosis with the following key...Ch. 18 - Normally you cant inherit both copies of a...Ch. 18 - Suppose you have a way of measuring the amount of...Ch. 18 - Adams maternal and paternal chromosomes have...Ch. 18 - Fresh out of college, Maria has her first job...
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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
- 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 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_forwardA phenotypically normal boy has 45 chromosomes, but his sister, who has Down syndrome, has 46. Suggest an explanation that explains both children.arrow_forward
- Assume for a moment that crossing-over did not occur. Would you agree that you received half of your chromosomes from each parent? Would you agree that you received one-quarter of your chromosomes from each grandparent? Would the answer to these questions change if you allowed for crossing-over to have occurred?arrow_forwardOn average, what proportion of the genome in the following pairs of humans would be exactly the same if no crossing over took place? (For the purposes of this question only, we will ignore the special case of the X and Y sex chromosomes and assume that all genes are located on nonsex chromosomes.)a. Father and childb. Mother and childc. Two full siblings (offspring that have the same two biological parents)d. Half siblings (offspring that have only one biological parent in common)arrow_forwardIf you ignore the effect of crossing over, would you expect the genetic information in the secondary oocyte and the first polar body to be identical? Explain your answer completely.arrow_forward
- What type of nondisjunction is the chromosome abnormality? Trisomy Or Monosomyarrow_forwardParents pass chromosomes in gametes to form the zygote, which will grow and develop to become an adult. But in the gametes of the adult, each chromosome will be a mix of mothers and father genes, not exclusively mother’s or father’s, as they were in the zygote. Why is this?arrow_forwardChange in chromosome numbers will lead to abnormalities. Which of the following is a correct match between the chromosome number and the syndrome? A. Trisomy 18 : Patau syndrome B. Monosomy 18 : Turner syndrome C. XXXY : Klinefelter syndrome D. Trisomy 21 : Edward syndromearrow_forward
- During meiosis, does random assortment occur before or after crossing-over?arrow_forwardHow does nondisjunction lead to abnormalities in chromosome number? Describe two types of genetic disorders that can result from nondisjunction.arrow_forwardGiven that a human normally contains 46 chromosomes, give the chromosome number for each of the following conditions: Turner syndrome (female, no Barr bodies): Klinefelter syndrome (male, one Barr body): Triploid: Down syndrome (trisomic): Trisomy 13:arrow_forward
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