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Heredity and Behavior: Is it All in the Genes?

Heredity and Behavior: Is it All in the Genes?. Emily Moler. Biological makeup is Intimately related to your behavior. Every cell in your body contains enduring messages from your mother and father These are found on the chromosomes that lie within nucleus. Chromosomes.

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Heredity and Behavior: Is it All in the Genes?

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  1. Heredity and Behavior: Is it All in the Genes? Emily Moler

  2. Biological makeup is Intimately related to your behavior.

  3. Every cell in your body contains enduring messages from your mother and father • These are found on the chromosomes that lie within nucleus

  4. Chromosomes • Strand of DNA that carry genetic information • There are 46 in each cell (except for the sex cells) and are found in 23 pairs, each half of the pair comes from either your mom or dad.

  5. Fertilization This is when a parent will give their genes to their child. • The parents create a zygote, which is a single cell formed by the union of a sperm and an egg.

  6. Genes • They are found on chromosomes. DNA segments that serve as the key functional units in hereditary transmission.

  7. More on Chromosomes • This is not including any mutations or crossing overs that may occur. So because of this: Each of the 23 chromosome pairs can be scrambled in over 8 million (2 to the 23rd power) ways.

  8. Everything is a matter of probability!!

  9. Ways to pair up: Homozygous This is when the genes from the parents are the exact same. Heterozygous This is when the genes from the parents are different.

  10. Because of this difference there are dominant and recessive genes. • Dominant: • Recessive: These are masked during a heterozygous pairing. These are always shown during a heterozygous pairing.

  11. Genotype v. Phenotype • Phenotype: Genotype: How a person’s genotype is physically manifested. Cannot be changed Can be changed by time or environment A person’s genetic makeup

  12. Phenotype . . . Some different genotypes may blend together to form an “Averaged out” phenotype, for example hair or eye color.

  13. Polygenic traits • These are influenced by more than one pair of genes. • For example, the skin color is influenced by about 3 to 5 pairs of genes.

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