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4.4
Gender Determination in Humans
4
Biology
9th Grade
05/02/2013
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Term
karyotype
 Definition
arrangement of an organism’s chromosomes from one body
cell
Term
sex chromosomes
 Definition
Both the primary and secondary sexual
characteristics in humans are controlled by the two sex chromosomes, the X chromosome and the Y chromosome
Term
type of chromosomes
 Definition
Females have two X chromosomes and males have one X chromosome
and one Y chromosome
Term
sex-linked characteristics
 Definition
Female offspring have
23 pairs of homologous chromosomes with corresponding genes. Males,
however, have one X chromosome and one Y chromosome.they occur more frequently in males than in females.
as baldness,red-green colour blindness,Hemophilia more common in males.
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