National Center for Biotechnology information

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Presentation transcript:

National Center for Biotechnology information http://www.ncbi.nlm.nih.gov/cgi-bin/SCIENCE96/genelist Chromosome X Chromosome Y

http://press2. nci. nih. gov/sciencebehind/genetesting/genetesting21 http://press2.nci.nih.gov/sciencebehind/genetesting/genetesting21.htm

External Development Initially undifferentiated, the presence of hormones causes sexual differentiation

Internal Development Initially undifferentiated, the presence of hormones causes sexual differentiation

Karyotype kar·y·o·type n. The characterization of the chromosomal complement of an individual or a species, including number, form, and size of the chromosomes. A photomicrograph of chromosomes arranged according to a standard classification.

Karyotype of a Human Child: Boy Fun activity available at http://www.biology.arizona.edu/human_bio/activities/karyotyping/karyotyping.html Karyotype of a Human Child: Boy

Karyotype of a Human Child: Girl http://www.bioweb.uncc.edu/biol1110/karyotyp.htm Karyotype of a Human Child: Girl