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Each human reprodcutive cell or gamete contains?
23 Chromosomes
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when conception occurs 2 cells form?
a zygote
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a zygote contains
23 chromosomes
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the 46th chromosome dictates
the organisims genetic inheritence or genotype.
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the 23 chromosome determines
the sex xx xy
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phenotype
observable characteristics, appearance, personality,intelligene
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genotype
a persons gentic inheritance
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dizygotic twin
fraternal, have 1/2 genes in common
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monozygotic twins
identical, rare origanate from one zygote, genotype the same
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down syndrome
47 chromosomes instead of 46
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