In order to complete this activity you will be reading and looking at animations on the Classical Genetics module from "DNA Learning Center. I higkly recommend that you open the corresponding windows side by side, which will make it easier for you to interact with the site.

Children resemble their parents.

Concept 1

1

What are some of the useful traits that humans have accentuated by controlled mating?

1

What is a gene?

Concept 1 - Animation

1

Why did Mendel work with peas?

1

What is cross fertilization?

1

Knowledge check: Gregor Mendel used pea plants to study inheritance. If you wanted to do the same thing what would you need to do? Check all that apply

Set aside enough room to grow pea plants.

Become a monk, like Gregor Mendel

Know how to grow pea plants

Keep notes on the plant generations.

Get the materials necessary for growing pea plants

1

Knowledge check: Mendel grew his pea plants in a small garden. He controlled the growing conditions as much as possible. Why is this important?

Genes come in pairs

Concept

1

What did Mendel conclude from his experiments?

Animation

1

What is a phenotype?

1

What are the seven traits of pea plants that Mendel worked with? Check all that apply

1

How many phenotypes does each trait have?

1

2

3

4

1

What is an allele?

1

What is a genotype?

1

What is a purebred?

1

Knowledge check: You want to repeat Mendel’s experiments with an eighth trait. You choose flower color. Pea plants have flowers that are white or colored. To get a pure-bred colored flower you start with a colored flower plant. What should you do next?

Nothing, this is a purebred colored flower plant

Self-fertilize this plant. If all the flowers of the next generation are colored, the plant is purebred.

Cross-fertilize this plant with a colored flower plant.

Cross-fertilize this plant with a white flower plant.

1

Knowledge check: If in the second generation you still got some white flowers, what should you do next to get a colored pure-bred plant?

Nothing, there is no way to get a purebred from this experiment.

Choose several of the colored flower plants, self-fertilize them, then plant and grow the seeds.

Choose several of the white flower plants, self-fertilize them , then plant the seeds. If you get colored offspring you know that they are purebred.

1

Knowledge check: How many times do you need to keep self-fertilizing the colored plants to get a purebred colored plant?

Once more.

Twice more.

Indefinitely, until you get all colored offspring.

Indefinitely, until you get all white offspring.

Genes don’t blend

Concept

1

In Mendel’s experiment, did the pea plants produce offspring with blended traits?

Yes

No

Animation

1

If a “puffed” pod purebred pea is crossed with a “pinched” pod purebred pea, will the offspring be “semi-puffed”?

Yes

No

1

Knowledge check: If a pure-bred tall plant is crossed with a pure-bred short plant, the offspring will be:

Either tall or short

All offspring will be medium sized.

Some offspring will be tall, some will be short and some will be medium sized.

MS-LS3-2

Some genes are dominant

Concept

1

What is a dominant trait?

1

What is a recessive trait?

Animation

1

What does the term homozygous mean?

1

What does the term heterozygous mean?

1

What happens to the recessive allele in a heterozygous offspring?

1

Knowledge check: If the yellow allele is dominant (Y) and the green allele is recessive (y), what are the possible genotypes a yellow the offspring? Check all that apply

YY

Yy

yy

MS-LS3-2

1

Knowledge check: If the yellow allele is dominant (Y) and the green allele is recessive (y), what are the possible genotypes of a green offspring?

YY

Yy

yy

MS-LS3-2

Mendelian Genetics Guided Notes

Genes come in pairs

Genes don’t blend

Some genes are dominant

Mendelian Genetics Guided Notes

Children resemble their parents.

What are some of the useful traits that humans have accentuated by controlled mating?

What is a gene?

Why did Mendel work with peas?

What is cross fertilization?

Knowledge check: Gregor Mendel used pea plants to study inheritance. If you wanted to do the same thing what would you need to do? Check all that apply

Knowledge check: Mendel grew his pea plants in a small garden. He controlled the growing conditions as much as possible. Why is this important?

Genes come in pairs

What did Mendel conclude from his experiments?

What is a phenotype?

What are the seven traits of pea plants that Mendel worked with? Check all that apply

How many phenotypes does each trait have?

What is an allele?

What is a genotype?

What is a purebred?

Knowledge check: You want to repeat Mendel’s experiments with an eighth trait. You choose flower color. Pea plants have flowers that are white or colored. To get a pure-bred colored flower you start with a colored flower plant. What should you do next?

Knowledge check: If in the second generation you still got some white flowers, what should you do next to get a colored pure-bred plant?

Knowledge check: How many times do you need to keep self-fertilizing the colored plants to get a purebred colored plant?

Genes don’t blend

In Mendel’s experiment, did the pea plants produce offspring with blended traits?

If a “puffed” pod purebred pea is crossed with a “pinched” pod purebred pea, will the offspring be “semi-puffed”?

Knowledge check: If a pure-bred tall plant is crossed with a pure-bred short plant, the offspring will be:

Some genes are dominant

What is a dominant trait?

What is a recessive trait?

What does the term homozygous mean?

What does the term heterozygous mean?

What happens to the recessive allele in a heterozygous offspring?

Knowledge check: If the yellow allele is dominant (Y) and the green allele is recessive (y), what are the possible genotypes a yellow the offspring? Check all that apply

Knowledge check: If the yellow allele is dominant (Y) and the green allele is recessive (y), what are the possible genotypes of a green offspring?

Children resemble their parents.

What are some of the useful traits that humans have accentuated by controlled mating?

What is a gene?

Why did Mendel work with peas?

What is cross fertilization?

Knowledge check: Gregor Mendel used pea plants to study inheritance. If you wanted to do the same thing what would you need to do? Check all that apply

Knowledge check: Mendel grew his pea plants in a small garden. He controlled the growing conditions as much as possible. Why is this important?

What did Mendel conclude from his experiments?

What is a phenotype?

What are the seven traits of pea plants that Mendel worked with? Check all that apply

How many phenotypes does each trait have?

What is an allele?

What is a genotype?

What is a purebred?

Knowledge check: You want to repeat Mendel’s experiments with an eighth trait. You choose flower color. Pea plants have flowers that are white or colored. To get a pure-bred colored flower you start with a colored flower plant. What should you do next?

Knowledge check: If in the second generation you still got some white flowers, what should you do next to get a colored pure-bred plant?

Knowledge check: How many times do you need to keep self-fertilizing the colored plants to get a purebred colored plant?

In Mendel’s experiment, did the pea plants produce offspring with blended traits?

If a “puffed” pod purebred pea is crossed with a “pinched” pod purebred pea, will the offspring be “semi-puffed”?

Knowledge check: If a pure-bred tall plant is crossed with a pure-bred short plant, the offspring will be:

What is a dominant trait?

What is a recessive trait?

What does the term homozygous mean?

What does the term heterozygous mean?

What happens to the recessive allele in a heterozygous offspring?

Knowledge check: If the yellow allele is dominant (Y) and the green allele is recessive (y), what are the possible genotypes a yellow the offspring? Check all that apply

Knowledge check: If the yellow allele is dominant (Y) and the green allele is recessive (y), what are the possible genotypes of a green offspring?