Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 17.2, Problem 1CC
Summary Introduction
To determine:
The number of ways in which the three pairs of homologous chromosomes (each present on a different chromosome) align themselves during metaphase I, and also determine the types of gamete that can be produced.
Introduction:
Mendel gave three different laws to explain inheritance, namely, the law of dominance, the law of segregation and the law of independent assortment. According to the law of independent assortment, genes coding for a particular trait segregates independently during the formation of gametes.
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MAKE CONNECTIONS The ABO blood type locus hasbeen mapped on chromosome 9. A father who has typeAB blood and a mother who has type O blood have achild with trisomy 9 and type A blood. Using this information, can you tell in which parent the nondisjunctionoccurred? Explain your answer. (See Figures 14.11and 15.13.)
ACTIVITY 5: Sex-linked inheritance
In many animals, the sex of an individual is determined by which sex chromosomes (X or Y) are inherited. In mammals (and the fruit fly Drosophila), females have 2 X chromosomes and males have one X and one Y. The X and Y are an unusual pair of homologous chromosomes. The X is large and contains thousands of genes, while the Y is small and contains few genes. Most genes on the X are not found on the Y, so males possess only one copy of each X-linked gene and females have 2 copies. This means that X-linked recessive traits are expressed more often in males.
Eye color is a sex-linked trait in Drosophila. The allele for red eyes is dominant to the allele for white eyes. Because this gene is on the X chromosome, the alleles are written as XR and Xr.
A. Do a Punnett square for a cross between a homozygous red-eyed female (XR XR ) and a white-eyed male (Xr Y).
What would be the genotypes of the female…
Chapter 17 Solutions
Biology
Ch. 17.1 - Prob. 1CCCh. 17.1 - Prob. 2CCCh. 17.1 - Prob. 3CCCh. 17.1 - Prob. 4CCCh. 17.1 - Mendels Laws of Inheritance Concept Check: What...Ch. 17.2 - Prob. 1CSCh. 17.2 - Prob. 2CSCh. 17.2 - Prob. 1CCCh. 17.3 - Prob. 1CCCh. 17.3 - Prob. 2CC
Ch. 17.4 - Prob. 1CCCh. 17.4 - Prob. 1EQCh. 17.4 - Prob. 2EQCh. 17.4 - Prob. 3EQCh. 17.5 - Prob. 1CSCh. 17.5 - Prob. 1CCCh. 17.6 - Prob. 1CCCh. 17 - Prob. 1TYCh. 17 - During which phase of nuclear division does the...Ch. 17 - Prob. 3TYCh. 17 - Which of Mendels laws cannot be observed in a...Ch. 17 - During a __________blank, an individual with the...Ch. 17 - Prob. 6TYCh. 17 - Prob. 7TYCh. 17 - A hypothetical flowering plant species produces...Ch. 17 - Genes located on a sex chromosome are said to be...Ch. 17 - Prob. 10TYCh. 17 - Prob. 1CQCh. 17 - A cross is made between individuals having the...Ch. 17 - Core Concept: Systems We can view life as a...Ch. 17 - Discuss the principles of the chromosome theory of...Ch. 17 - When examining a human pedigree, what patterns do...
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