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(Mod) Sci 8A Checkpoint 04: Modern Genetics

Authored by Matthew Carlson

Science

8th Grade

Used 3+ times

(Mod) Sci 8A Checkpoint 04: Modern Genetics
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

Which of these is a pigment?

chlorophyll

carbon dioxide

2.

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

Why are some parts of a plant white?

The white parts absorb all colors except white.

The white parts reflect all colors of light.

3.

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

How do purple pigments make flower petals look purple?

Purple pigments absorb purple light and reflect other colors. Only purple light stays in the pigment, so it looks purple.

Purple pigments absorb all colors except purple. Purple light is reflected, so the petal looks purple.

4.

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

What is the difference between a dominant and a recessive color allele in pea plants?

Both alleles make pigments. The recessive pigment is white.

A dominant allele makes pigment proteins. A recessive allele does not make these proteins.

5.

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

Which statement about chromosomes is correct?

C. A gene is made of one allele on a chromosome. Sex cells have that allele.

D. A gene has two alleles on separate chromosomes. Sex cells have one allele for each gene.

6.

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

Which statement shows a similarity between Mendel’s findings and chromosome behavior in cell division?

Mendel found that two parents give genes to offspring. In cell division, the cell loses half its chromosomes and then makes more to replace them.

Mendel found that two parents give genes to offspring. In cell division, chromosomes split, and half go to each new cell.

7.

MULTIPLE SELECT QUESTION

30 mins • 1 pt

Which cases cannot be explained by Mendel’s genetics? (Select all that apply.)

A. A person with a short and a tall parent is as tall as the tall parent.

B. A person with a short and a tall parent has a height between the two parents.

C. A person with a short and a tall parent is as tall as the short parent.

D. A person with a short and a tall parent is shorter than the short parent.

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