genetics and heredity

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Genetics and Heredity “Why We Look the Way We Do”
Genes: Our Biological Blueprint
Genes
basic units of heredity that maintain their structural identity from one generation to another. the biochemical units of heredity that make up the chromosomes a segment of DNA capable of synthesizing a protein
Genes are aligned along chromosomes (strands of genes) and come in pairs.
Chromosomes
threadlike structures made of DNA molecules that contain the genes DNA (deoxyribonucleic acid) a complex molecule containing the genetic information that makes up the chromosomes has two strands-forming a “double helix”- held together by bonds between pairs of nucleotides

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Sickle-cell disease is caused by the substitution of a single amino acid in the hemoglobin protein of red blood cells

Pattern Baldness In Humans: A Sex Influenced Trait
Baldness is an autosomal trait and is apparently influenced by sex hormones after people reach 30 years of age or older.
In men the gene is dominant, while in women it is recessive. A man needs only one allele (B) for the baldness trait to be expressed, while a bald woman must be homozygous for the trait (BB).

Human Genome Project, Findings
Humans are 99.95% identical
Many human genes appear only in humans and appear to have come from bacteria.
One gene makes 2 or 3 proteins, complex chains of amino acids that carry out the tasks of life.
Every human’s genome shows the residues of evolution. Dominant and Recessive Genes
A dominant trait does not mean "more potent" and recessive does not mean "weaker."
The terms refer to the visible trait.
Genes: Our Biological Blueprint
Is there a difference between female and male brains?
What do you think?
What do we know?

Evolutionary Psychology
Evolutionary Psychology study of the evolution of behavior using the principle of natural selection, which presumably favors genes that predispose behavior tendencies and information--processing systems that solved adaptive problems faced by our ancestors
Evolutionary psychology (sociobiology)
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