(a) What is a Barr body? (b) How many Barr bodies are present in a person 2n = 47, XXX (c) Is it possible for an individual with Turner's syndrome to have a Barr body present? Explain.
(a) What is a Barr body? (b) How many Barr bodies are present in a person 2n = 47, XXX (c) Is it possible for an individual with Turner's syndrome to have a Barr body present? Explain.
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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Transcribed Image Text:(a) What is a Barr
body?
(b) How many Barr bodies are present in a person 2n = 47, XXX
(c) Is it possible for an individual with Turner's syndrome to
have a Barr body present? Explain.
(a) Starting with a fertilized egg (zygote), a series of five cell
divisions would produce an early embryo with how many
cells?
(b) If there are 20 chromatids in a cell, how many centromeres
are there? Explain your
answer.
(c) Diagrammatically, show a metacentric chromosome in G1
phase of the cell cycle and in G2 of the cell
сycle.
(d) A cell containing 92 chromatids at metaphase of mitosis
would, at its completion, produce two nuclei containing
how many chromosomes?
(e) If cells in the process of dividing are subjected to
colchicine, a drug that interferes with the functioning of the
spindle apparatus, at which stage will mitosis be
arrested?
Transcribed Image Text:Discuss the following concepts:
(a) homologous chromosomes
x ½ = 2)
(b) diploidy
(c)
haploidy
Answer the following questions with either True or False.
Provide a justification for your choice.
(a) Alleles occupy different loci on homologous
chromosomes.
(b) Although alleles govern the same kinds of characteristics,
they do not necessarily contain identical
information.
(e) The special region on a duplicated chromosome that holds
the sister chromatids together is a centrosome.
What names are assigned to chromosomes on the basis of their
centromere placement, and where is the centromere located in
each case?
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