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Genetics

Genetics. The study of genes and the inheritance of traits. Characteristics. These are features you exhibit physically ( your looks) Example : Eye color - green. Traits. The different versions of a characteristic Example: blue, green, and brown eyes. Inheritance.

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Genetics

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  1. Genetics The study of genes and the inheritance of traits

  2. Characteristics • These are features you exhibit physically ( your looks) Example: Eye color - green

  3. Traits • The different versions of a characteristic • Example: blue, green, and brown eyes

  4. Inheritance • Occurs when traits are passed down from parent to child.

  5. Genes • Bits of information passed down from parent to child. • Made of chemicals called DNA.

  6. Genetic Diseases • Can be passed on through genes from a parent to the child. • Example : Marfan Syndrome (Individual is tall, has long arms and legs) Remember - JOE

  7. Reproduction • Sexual – Sperm fertilizes an egg to produce offspring • Asexual – occurs when 1 organism copies itself to produce offspring

  8. Fertilization • Occurs when a sperm unites with an egg

  9. Offspring • Another name for the children of a male and female parent

  10. Mutation • Occurs when genes make a mistake mixing and produce new or different traits in the offspring.

  11. Genotype • A combination of alleles Example: TT, Tt, or tt *We flipped coins to determine the genotype of our critters and puppies.

  12. Alleles • T – is considered a dominant allele • t – is considered a recessive allele TT – is dominant Tt or tT – is dominant tt - is recessive

  13. Punnett Square • Uses mom and dad’s genotypes to determine the possible traits of their offspring. • 4 offspring

  14. Phenotype • They are the traits determined by reading the genotype. • Example : FF = black fur • Black fur is the phenotype or trait

  15. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

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