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Genetics

This presentation provides an overview of genetics, including the study of genes, inheritance of traits, and genetic diseases. It explains characteristics and traits, discusses the process of reproduction and fertilization, and introduces concepts such as mutation, genotype, and phenotype. The use of Punnett squares to determine possible offspring traits is also explained.

Olivia
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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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