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Chapter 10
Patterns of Inheritance
9
Biology
Undergraduate 1
12/14/2011

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Term
Traits controlled by sex-linked recessive genes are expressed more often in males because
Definition
the male has only one gene for the trait
Term
Each normal human possesses in his or her body cells
Definition
1 pair of sex chromosomes and 22 pairs of autosomes
Term
A colorblind woman (XcXc)has children with a noncolorblind man (XcY). Which of the following is true of their children?
Definition
All daughters will be heterozygous (carriers) and all sons will be colorblind.
Term
Which of the following could be detected by counting up the number of chromosomes in a cell of the affected person?
Definition
trisomy 21
Term
Which of these is not a genetic gene disorder?
Definition
malaria
Term
A recessive allele on the X chromosome causes colorblindness. A noncolorblind woman (whose father is colorblind) has children with a colorblind man. What are the chances their son will be colorblind?
Definition
50%
Term
A colorblind boy has a noncolorblind mother and a colorblind father. From which parent did he get the colorblind gene?
Definition
mother
Term
Hemophilia is a sex-linked recessive gene causing a blood disorder. what are the chances that the daughter of a normal man (XHY) and a heterozygous woman (XHXh)will have hemophilia?
Definition
0%
Term
A man who carries a harmful sex-linked gene will pass the gene on to
Definition
all of his daughters
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