BIOLOGY
12th Edition
ISBN: 9781264839698
Author: Raven
Publisher: MCG CUSTOM
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Chapter 24.2, Problem 3LO
Summary Introduction
To determine: The reason thatgenome of a polyploid is not identical to the sum of the parental genomes.
Introduction: A genetic disorder is an alteration in the genetic composition of the individual for one or more genes that are manifested in the form of altered protein sequence for that particular trait. The genetic disorder is
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Explain why unequal crossing over always produced a duplication and deletion at the same time, not just a duplication alone or a deletion alone.
Compare the following three terms: polyploidy, aneuploidy, and nondisjunction. Briefly discuss examples of each of these conditions.
A diploid species has 3 pairs of chromosomes in its somatic cells. In males, the first pair is large submetacentric[1]; the second is medium acrocentric[2], and the third is small telocentric[3]. In females, the first two pairs are like those of the males while the third is large metacentric[4][5], with satellite4 Illustrate the karyograms (drawing/picture of the chromosome) of the following:
A triploid cell in females
tetrasomic cell in males
tetraploid cell in females
[1] submetacentric --centrosome is just above the middle of the chromosome
[2] acrocentric --centrosome is much higher location than submetacentric so that the “p” arm of the chromosome is much shorter than the q arm
[3] telocentric --the centromere is at the end of the chromosome
[4] metacentric --centrosome is in the middle of the chromosome; thus the “p-arm” and the “q-arm” or both arms of the chromosome are equal in length
[5] satellite-a constriction in an arm of a chromosome, aside…
Chapter 24 Solutions
BIOLOGY
Ch. 24.1 - Prob. 1LOCh. 24.1 - Prob. 2LOCh. 24.1 - Prob. 3LOCh. 24.2 - Prob. 1LOCh. 24.2 - Prob. 2LOCh. 24.2 - Prob. 3LOCh. 24.2 - Explain why genome size and genome number do not...Ch. 24.3 - Define the terms segmental duplication, genome...Ch. 24.3 - Prob. 2LOCh. 24.4 - Prob. 1LO
Ch. 24.4 - Prob. 2LOCh. 24.5 - Prob. 1LOCh. 24.5 - Prob. 2LOCh. 24.5 - Prob. 3LOCh. 24 - Prob. 1DACh. 24 - Prob. 1IQCh. 24 - Prob. 2IQCh. 24 - Prob. 3IQCh. 24 - Humans and pufferfish diverged from a common...Ch. 24 - Prob. 2UCh. 24 - Prob. 3UCh. 24 - Homologous genes in distantly related organisms...Ch. 24 - All of the following are believed to contribute to...Ch. 24 - What is the fate of most duplicated genes? a. Gene...Ch. 24 - Chimp and human DNA whole-genome sequences differ...Ch. 24 - Prob. 2ACh. 24 - Analyze the conclusion that the Medicago...Ch. 24 - Analyze why an herbicide that targets the...Ch. 24 - The FOX2 gene is associated with speech in human....Ch. 24 - One of the common misconceptions about sequencing...Ch. 24 - How does horizontal gene transfer (HGT) complicate...
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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
- Give a reason for the discontinuous synthesis of DNA on one of the parental strands?arrow_forwardIn a human karyotype, chromosomes are arranged in 23 pairs. If one of the autosomal pairs is examined, which of the following characteristics will the two chromosomes of the pair have in common? a) loci and staining pattern b) length and DNA sequence c) X-like shape and alignment on the metaphase plate d) alleles and centromere positionarrow_forwardChorionic villus sampling is a procedure to determine if there are any abnormalities in chromosome number in the fetus. Why can the chorionic villi be used to determine abnormalities in the fetus?arrow_forward
- Here is a strawberry karyotype - ignore the different colours. How many chromosomes are shown in the figure? What is the ploidy of this type of strawberry? How many alleles could an individual strawberry have at each locus? Finally during the G2 stage of cell division, how many double helixes would be in this picture if you drew them over the chromosomes? Many domesticated plants are polyploid - give one possible reason why this might be the case, with a focus on using genetic principles to reason it out (i.e., you don't have to be right per se, you have to build an argument based on what you've already learned).arrow_forwardWhy is chromosome 21 the smallest and not chromosome 22? considering that a karyogram is arranged from largest to smallestarrow_forwardExplain the reason why a dicentric chromosome is unstable.arrow_forward
- Are the epsilon (ε) and beta (β) genes on chromosome 11 orthologs or paralogs? Explain your answer.arrow_forwardReferring to Figure 17-19, draw a diagram showing the process whereby an inversion formed from crossing over could generate a normal sequence.arrow_forwardExplain two ways that a chromosomal rearrangement can cause a position effect.arrow_forward
- Chromosome structural errors can occur during Meiosis which can lead to health disorders. Examine the figure below and select the correct order of error type from left to right in which they appear. duplicati on, translocation, deleti on, inversion duplication, inversion, del etion, translocation O deletion, translocati on, inversion, duplication O translocation, inversion, duplication, deletion inversion, translocation, duplication, deletionarrow_forwardA specific human individual with a male sex has the same sex chromosome complement as a metafemale Drosophila fly. Both individuals have a diploid set of autosomes.i) What is the sex chromosome complement of these two individuals? ii) If these individuals were produced from a fertilization event involving an abnormal egg and abnormal sperm cell, provide the genetic make-up of the two gametes? Clearly indicate the male and female gametes.arrow_forwarda) Explain why when a chiasma is formed, only 50% of the meiotic products will be of recombinant type. b) Determine the sequence of the three genes (y, cl and vg) that are linked on a chromosome based on the genetic distances provided below: y- vg 43 y- cl vg – cl 5 38arrow_forward
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