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Chapter 4

Psychology 1000 Chapter Notes - Chapter 4: Reciprocal Altruism, Extraversion And Introversion, Bipedalism


Department
Psychology
Course Code
PSYCH 1000
Professor
Dr.Mike
Chapter
4

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Chapter 4 Notes
Chromosome: tightly coiled molecule of deoxyribonucleic
acid (dna)
Genes: where our hereditary blueprint is, part of the
chromosome
Cells have 46 chromosomes
Sex cell has 23 chromosomes
Female 23 + Male 23 = Zygote 46
Somatic cells (diploid:): two sets of chromosomes; one inherited from each parent
Gametes (haploid): one set of chromosome, one half from each parent
Alleles: two genes, one on each chromosome that control the same trait
Equal chance of getting each unless dominant or recessive
Dominant:
Recessive: characteristic will not be present unless the gene from both parents is recessive
Phenotype: what is expressed physically
Genotype: what is expressed genetically
Heterozygous: Ww
Homozygous: WW or ww
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