Masteringbiology With Pearson Etext -- Valuepack Access Card -- For Human Biology: Concepts And Current Issues
8th Edition
ISBN: 9780134254906
Author: Johnson
Publisher: PEARSON
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Chapter 19, Problem 1TY
All of the following statements about homologous chromosomes are true except:
a. One of each pair of homologous chromosomes comes from each parent.
b. The alleles on homologous chromosomes are identical to each other.
c. They have genes for the same traits at the same loci.
d. Homologous chromosomes physically pair up and may exchange parts during meiosis.
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Students have asked these similar questions
The physical cause of the law of independent assortment for genes on the same chromosome is which of the following?
Group of answer choices
A. crossing over
B. separation of homologous chromosomes in mitosis
C.separation of sister chromatids in mitosis
D. separation of sister chromatids in meiosis
E. separation of homologous chromosomes in meiosis
The diploid number of an organism is 12. How many chromosomes would be expected from the following conditions?
a. monosomic for 1 chromosome
b. trisomic for 2 chromosomes
c. tetrasomic for 1 chromosome
d. nullosomic for 2 chromosomes
e. monoploid
f. triploid
Which of the following is a FALSE statement regarding human chromosomes?
A.
The chromosome number in humans is 2n=46.
B.
Gametes have half number of the chromosomes as in somatic cells.
C.
There are 22 pairs of autosomes and 2 sex chromosomes.
D.
Liver cells can be polyploids. They can have 23, 46, 69 or 92 chromosomes.
Chapter 19 Solutions
Masteringbiology With Pearson Etext -- Valuepack Access Card -- For Human Biology: Concepts And Current Issues
Ch. 19 - If you might be a carrier of a gene for an...Ch. 19 - Prob. 2QCCh. 19 - Prob. 1CRCh. 19 - Prob. 2CRCh. 19 -
3. Distinguish between genotype and phenotype.
Ch. 19 - Describe the contributions of Mendel to the field...Ch. 19 - Explain how alterations of chromosome number and...Ch. 19 - Prob. 6CRCh. 19 - Prob. 7CRCh. 19 - Describe what is meant by sex-linked inheritance.
Ch. 19 -
9. Explain why lethal diseases caused by dominant...Ch. 19 - Prob. 10CRCh. 19 - All of the following statements about homologous...Ch. 19 - Prob. 2TYCh. 19 -
3. Which of the following statements correctly...Ch. 19 - Prob. 4TYCh. 19 - Prob. 5TYCh. 19 - Prob. 6TYCh. 19 - Prob. 7TYCh. 19 - Which of the following results in the separation...Ch. 19 - Prob. 9TYCh. 19 - Prob. 10TYCh. 19 - What tool is used to determine the probabilities...Ch. 19 - Prob. 12TYCh. 19 - What is the basis for the tremendous genetic...Ch. 19 - Prob. 14TYCh. 19 -
15. Which of the following events or processes...Ch. 19 -
1. What fraction of the offspring of two...Ch. 19 -
2. Why is it that the range of resting blood...Ch. 19 - Prob. 3AWKCh. 19 - Geneticists often study patterns of gene transfer...Ch. 19 - Prob. 5AWKCh. 19 - Prob. 6AWKCh. 19 - Nondisjunction during meiosis can lead to the...
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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
- Sex-reversed females with XY were found to be missing SRY gene on their Y chromosomes, while sex-reversed males with XX were found to carry a portion of a Y chromosome that has the SRY gene. What can you conclude from these two cases? 1.Sex determination depends primarily on the combination of sex chromosomes and the presence of SRY gene. 2.X and Y chromosomes can’t pair up during meiosis because they are not true homologous chromosomes. 3.Nonreciprocal crossover could result in translocation of the SRY gene between X and Y chromosome. 4. The SRY gene has a key role to determine maleness. 5.The Y chromosome contains a gene that determine maleness.arrow_forwardWhich of the following statements does not correctly describe the characteristics of homologous chromosomes? Select one: a. They have the centromeres located at the same spot. b. They contain identical alleles. c. They contain the same genes. d. The size and shape of the chromosomes are the same.arrow_forwardAn organism has two chromosomes only. Chromosome 1 has its centromere near one end and carries the A-locus. Chromosome 2 has its centromere at the centre and carries the B-locus. Consider a heterozygous with alleles A and B inherited from one parent and alleles a and b from the other parent. What does the following figure represent? a. Metaphase of meiosis I b. Metaphase of meiosis II c. Metaphase of mitosis d. Metaphase of mitosis or meiosis IIarrow_forward
- Which of the below explains why trisomy is better tolerated in humans than monosomy? (Select all correct options). a. Loss of heterozygosity in monosomy b. Increased gene expression in trisomic cells is beneficial c. Reduced gene expression in monosomy d.The extra chromosome in trisomic cells is degraded Which two are both necessary to hold a tetrad together until Anaphase I? a) nondisjunction b) cross over c) centromere cohesion d) synaptonemal complex e) separese activityarrow_forwardGenes G and H are located on chromosome 18. A woman with the genotype Gg Hh has a child with a man with the genotype GG HH. Unfortunately, the child has the genotype Ggg hhh and only survives for 6 months. When and in which parent did nondisjunction occur? Group of answer choices a. Meiosis II in the mother b. Meiosis I in the mother c. Meiosis I in the father d. Meiosis II in the fatherarrow_forwardDuring meiosis, when crossing-over occurs between two homologous chromosomes, it does not happen at a single point, but rather two points with a stretch of DNA in between. What are the two junction points called?What is the region between the two points called and what is different about this region compared to how double-stranded DNA usually is?If the region described in b.) is located within a gene and the two homologues have different alleles of this gene, what might happen that is a direct violation of Mendel’s first law? (Describe the process with 2-3 sentences of detail.)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 S T • U D E F R S T • U V W X a. Draw a picture of these chromosomes pairing in prophase I of meiosis. b. Draw the products of alternate, adjacent-1, and adjacent-2 segregations. c. Explain why the fertility of this individual is likely to be less than the fertility of an individual without a translocation.arrow_forwardA woman with normal chromosomes mates with a man who also has normal chromosomes. a. Suppose that, in the course of oogenesis, the woman’s sex chromosomes undergo nondisjunction in meiosis I; the man’s chromosomes separate normally. Give all possible combinations of sex chromosomes that this couple’s children might inherit and the number of Barr bodies that you would expect to see in each of the cells of each child. b. 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_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 a. Draw the pairing arrangement of these chromosomes in prophase I of meiosis. b. Diagram the alternate, adjacent-1, and adjacent-2 segregation patterns in anaphase I of meiosis. c. Give the products that result from alternate, adjacent-1, and adjacent-2 segregation.arrow_forward
- Which of the following best describes the concept of independent assortment? Group of answer choices a. 2n, where n = number of chromosomes b. Gametes receive one of each chromosome pair but which chromosome it receives is decided randomly c. Refers to the Mendelian genetics d. Independent assortment always occurs at prophase 2 in eukaryotic organisms. e. Is the process of specified segregation and assortment of chromosomes in an organism.arrow_forwardA,b and c pleasearrow_forwardA diploid fruit fly has eight chromosomes. How many total chromosomeswould be found in the following flies?A. TetraploidB. Trisomy 2C. Monosomy 3D. 3nE. 4n + 1arrow_forward
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