Genetics Introduction to the Work of Gregor Mendel (12.1,12.2)

Who is Gregor Mendel

• an Austrian Monk from the mid 1800s who contributed to the study of Genetics

• The scientist who discovered the structure of DNA

• a British scientist who discovered penicillin

• The scientist who used X-Ray Crystallography to shed light on the structure of DNA

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What did Gregor Mendel study?

• Mold Spores

• Pea Plants

• Sun Flowers

• Rats

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Why were pea plants perfect a study on Heredity?

• Pea plants are complex

• They were easy to study

• One gene controlled one trait. (i.e. it was simple)

• One gene was controlled by multiple traits

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What was Mendel's first conclusion?

• Pea plants were inheriting a pair of genetic instructions from both parents.

• Pea plants were inheriting genetic instructions from their grandparents.

• Pea plants were inheriting genetic instructions only from their maternal parent.

• Pea plants were inheriting genetic instructions only from their paternal parent

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What was Mendel's Second conclusion?

• The allele for tall plants was dominant to the short allele

• The allele for tall plants was the same strength, equal dominance, to the short allele

• The allele for tall plants was weaker, or more recessive, than the short allele

• The allele for short plants was stronger, or more dominant, than the tall allele

Mendel's Law of Segregation means?

• Every person has two alleles for each trait, they segregate from each other and the dominant is passed more often.

• Every person has two alleles for each trait, Where two traits are being passed, they do not effect each other.

• Every person has two alleles for each trait, they segregate from each other and are passed down at random.

• Every person has two alleles for each trait, they segregate from each other and the recessive is passed more often.

Different gene choices for a trait that are usually represented by capital and lowercase letters.

• Heredity

• Alleles

• Dominant

• Recessive

This allele hides the presence of another allele

• Dominant

• Recessive

• Homozygous

• Heterozygous

Which accurately describes the Law of Segregation?

• Each parent contributes a chromosome during fertilization

• Alleles move apart

• Each parent contributes one allele for each trait to their offspring

• Chromosomes move apart

What is the likelihood that an event will occur?

• Precognition

• Probability

• High chance

• Low chance

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