Download What phase of the cell cycle fails when nondisjunction occurs? J^ o

Chapter 13 Chromosomes, Mapping, and the meiosis-Inheritance Connection
Read 13.1
What are human female sex chromosomes? X-A
What are human male sex chromosomes? • J
Which chromosome carries sex-linked (or X-linked) traits?
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Read 13.2
What are autosomes? 5<s^< t'n
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If a male and a female both carry a single recessive allele for an X-linked disorder who
will express it?
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Why? no-thin c
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Read 13.4 ("Nondisjunction of chromosomes changes chromosome number" only)
Cystic fibrosis is a recessive disorder (meaning in order to be affected with cystic fibrosis
you must possess 2 recessive alleles). If both parents are heterozygous what percentage of
their children would be affected?
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Cystic fibrosis is a recessive disorder (meaning in order to be affected with cystic fibrosis
you must possess 2 recessive alleles). If both parents are homozygous dominant what
percentage of their children would be affected? \ y
Cystic fibrosis is a recessive disorder (meaning in order to be affected with cystic fibrosis
you must possess 2 recessive alleles). If both parents are homozygous recessive what
percentage of their childrenwould be affected? / CFQ 7*,
Cystic fibrosis is a recessive disorder (meaning in order to be affected with cystic fibrosis
you must possess 2 recessive alleles). If one parent is homozygous recessive and one
parent is heterozygous what percentage oftheir children would beaffected? ^ y
Cystic fibrosis is a recessive disorder (meaning in order to be affected with cystic fibrosis
you must possess 2 recessive alleles). If one parent is homozygous dominant and one
parent is heterozygous what percentage of their children would be affected? a V
Cystic fibrosis is a recessive disorder (meaning in order to be affected with cystic fibrosis
you must possess 2 recessive alleles). If one parent is homozygous recessive and one
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parent is homozygous dominant what percentage oftheir children would be affected? ®'*
What is nondisjunction? (j^r o.-v-a>j fr^4^ &0* 1 4^ J-Q-fi °^ c\ >\ji
What phase of the cell cycle fails when nondisjunction occurs? J^ o^f Utv-*-