This is a chromosomal disorder resulting from the non-disjunction of chromosome 21 during anaphase that gives an extra copy of the chromosome to the person who has inherited it. 24. This is a chromosomal disorder resulting from the non-disjunction of chromosome 21 during anaphase that gives an extra copy of the chromosome to the person who hasinherited it.O A. AlzheimerB. Parkinson'sTrisomyO c. Down SyndromeO D. Leukemia25. Crossing over involves each of the following with the EXCEPTION ofO A. Transfer of DNA segments between homologous chromosomesB. Formation of synaptonemal complexC. Alignment of homologous chromosomesO D. None, all are involved in crossing overOE. Formation of chiasmataO o o o O

Non-disjunction is a failure of separation of chromosomes or sister chromatids either in mitosis or…

24. This is a chromosomal disorder resulting from the non-disjunction of chromosome 21 during anaphase that gives an extra copy of the chromosome to the person who has inherited it. A. Alzheimer B. Parkinson's Trisomy C. Down Syndrome O D. Leukemia

24. This is a chromosomal disorder resulting from the non-disjunction of chromosome 21 during anaphase that gives an extra copy of the chromosome to the person who has inherited it. A. Alzheimer B. Parkinson's Trisomy C. Down Syndrome O D. Leukemia

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Hemophilia, disease in which the blood lacks a clotting factor, is caused by an X linked recessive gene. Joe doe not have hemophilia and Lucille is heterozygous for the condition. What is the chance that their MALE child will have hemophilia? (Note: you are calculating the probability for their MALE children only, in other words if they have 1 male child, what is the probability that he will be born with the disease?) 0% 1/4 or 25% 2/4 or 50% 3/4 or 75% 4/4 or 100%
A transfer of genes between non-homologous chromosomes is known as transolocation duplication aneuploidy trisomy crossing over
Caspar's genotype is HhRr. These genes are located on the same chromosome, so the haplotype is: H R h r For this problem, there is no recombination between the genes. Knowing this, draw for yourself how these chromosomes should align and separate during meiosis. Now, from the choices below, which gamete would represents a nondisjunction event in meiosis II? hr HhRr Hhr HHRR