Biological and Environmental Foundations. Child Psychology Dennis H. Karpowitz. Genetic Foundation. Genotype – The total you Phenotype – The you we see. 23 Pairs of Chomosomes = 46. Genetic Code. Chromosomes - 23 pairs = 46 DNA (deoxyribonucleic acid) Genes Mitosis. DNA. The Sex Cells.
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Dennis H. Karpowitz
46 Chromosomes in pairs
Crossing over with the 2 inner-most pair members
Pair chromosomes separate to form 2 sex cells of 23 chrom’s
The duplicated chromosomes separate to form gametes, each with 23 single chromosomes
Zygote, 46 chromosomes
1. XX pair - female
2. XY pair- male