Gregor Mendel

Gaiser Life Science

Know Answer one of the following:

Evidence

Page 34

Mendel’s Work

What physical traits do you have that are most like your mom?

What physical traits do you have that are most like your dad?

Do parent traits always look exactly the same in the offspring?Explain your answer

Clarifying ?s Information

Page 35

purebred

- Gregor Mendel is that “Father of Genetics.”- Gregor Mendel is that “Father of Genetics.”Who is Mendel?

Mendel’s Work

- plant/animal that always produces offspring w/same trait as parent- plant/animal that always produces offspring w/same trait as parent

- trait that always shows up in offspring when present in one parent.- trait that always shows up in offspring when present in one parent.

- trait that is always covered if a dominant allele is present- trait that is always covered if a dominant allele is present

Example: Purebred short plants always produce short plants (tt)

Example: 2 tall plants = tall offspring because tall is dominant

discoveries

dominant alleles

Recessive alleles Example: 1 tall plant + 1 short plant = tall

plant because tall is dominant

Clarifying ?s Information

Page 36

Mendel’s Work

Summary:

- different forms of a gene

- factors that control traits

- offspring with 2 different alleles for a trait

controls inheretance

symbols

alleles

gene

hybrid

Dominant alleles use capital letters.Example: TT or Tt

Recessive alleles use lower case letters.Example: Tt or tt

What letters are used? depends on the trait

Example: T = height, B = blacktraits - physical characteristics

heredity - passing traits from parents to offspring

Page 35

Clarifying ?s InformationMendel’s Work

purebred

- Gregor Mendel is that “Father of Genetics.”- Gregor Mendel is that “Father of Genetics.”Who is Mendel?

- plant/animal that always produces offspring w/same trait as parent- plant/animal that always produces offspring w/same trait as parent

- trait that always shows up in offspring when present in one parent.- trait that always shows up in offspring when present in one parent.

- trait that is always covered if a dominant allele is present- trait that is always covered if a dominant allele is present

Example: Purebred short plants always produce short plants (tt)

Example: 2 tall plants = tall offspring because tall is dominant

discoveries

dominant alleles

Recessive alleles Example: 1 tall plant + 1 short plant = tall

plant because tall is dominant

Page 36

Clarifying ?s InformationMendel’s Work

Summary:

- different forms of a gene

- factors that control traits

- offspring with 2 different alleles for a trait

symbols

alleles

gene

hybrid

Dominant alleles use capital letters.Example: TT or Tt

Recessive alleles use lower case letters.Example: Tt or tt

What letters are used? depends on the trait

Example: T = height, B = blacktraits - physical characteristics

heredity - passing traits from parents to offspring

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