Animation

null

The ABC Model of Plant Floral Development

Animation

Video

Video Player is loading.

Current Time 0:00

/

Duration 0:00

Loaded: 0%

Stream Type LIVE

Remaining Time -0:00

1x

Chapters

descriptions off, selected

captions settings, opens captions settings dialog
captions off, selected

This is a modal window.

Beginning of dialog window. Escape will cancel and close the window.

TextColorTransparency

BackgroundColorTransparency

WindowColorTransparency

Font Size

Text Edge Style

Font Family

End of dialog window.

This is a modal window. This modal can be closed by pressing the Escape key or activating the close button.

This is a modal window.

Animation Assessment

Question 1 of 8

Flower development in Arabidopsis provides a good demonstration of combinatorial control or how transcription factors working in combination direct production of three key proteins required for the development of the different flower parts.

Question 1 choicesChoice A., trueChoice B., false

Correct.

Incorrect.

Question 2 of 8

	Whorl 1	Whorl 2	Whorl 3	Whorl 4
Wild type (normal) Protein(s) present	Sepal A	Petal B + A	Stamen C + B	Carpel C
Mutant APETALA-2 Protein(s) present	Carpel C	Stamen C + B	Stamen C + B	Carpel C
Mutants APETALA-3 or PISTILLATA Protein(s) present	Sepal A	Sepal A	Carpel C	Carpel C
Mutant AGAMOUS Protein(s) present	Sepal A	Petal B + A	Petal B + A	Sepal A

A normal APETALA-2 gene must be present for the production of which protein?

Question 2 choicesChoice A., protein AChoice B., protein BChoice C., protein CChoice D., both protein B and protein CChoice E., both protein A and protein B

Correct.

Incorrect.

Question 3 of 8

	Whorl 1	Whorl 2	Whorl 3	Whorl 4
Wild type (normal) Protein(s) present	Sepal A	Petal B + A	Stamen C + B	Carpel C
Mutant APETALA-2 Protein(s) present	Carpel C	Stamen C + B	Stamen C + B	Carpel C
Mutants APETALA-3 or PISTILLATA Protein(s) present	Sepal A	Sepal A	Carpel C	Carpel C
Mutant AGAMOUS Protein(s) present	Sepal A	Petal B + A	Petal B + A	Sepal A

A normal AGAMOUS gene must be present for the production of which protein?

Question 3 choicesChoice A., protein AChoice B., protein BChoice C., protein CChoice D., both protein B and protein CChoice E., both protein A and protein B

Correct.

Incorrect.

Question 4 of 8

	Whorl 1	Whorl 2	Whorl 3	Whorl 4
Wild type (normal) Protein(s) present	Sepal A	Petal B + A	Stamen C + B	Carpel C
Mutant APETALA-2 Protein(s) present	Carpel C	Stamen C + B	Stamen C + B	Carpel C
Mutants APETALA-3 or PISTILLATA Protein(s) present	Sepal A	Sepal A	Carpel C	Carpel C
Mutant AGAMOUS Protein(s) present	Sepal A	Petal B + A	Petal B + A	Sepal A

If either the APETALA-3 or the PISTILLATA gene is mutated, which protein will not be produced?

Question 4 choicesChoice A., protein AChoice B., protein BChoice C., protein CChoice D., both protein B and protein CChoice E., both protein A and protein B

Correct.

Incorrect.

Question 5 of 8

	Whorl 1	Whorl 2	Whorl 3	Whorl 4
Wild type (normal) Protein(s) present	Sepal A	Petal B + A	Stamen C + B	Carpel C
Mutant APETALA-2 Protein(s) present	Carpel C	Stamen C + B	Stamen C + B	Carpel C
Mutants APETALA-3 or PISTILLATA Protein(s) present	Sepal A	Sepal A	Carpel C	Carpel C
Mutant AGAMOUS Protein(s) present	Sepal A	Petal B + A	Petal B + A	Sepal A

Let protein X represent one or more of the proteins listed in the table. Which protein(s) does X represent in the following statement? During normal development, the presence of protein A inhibits protein X in whorls 1 and 2, and the presence of protein X inhibits protein A in whorls 3 and 4.

Question 5 choicesChoice A., protein AChoice B., protein BChoice C., protein CChoice D., both protein B and protein CChoice E., both protein A and protein B

Correct.

Incorrect.

Question 6 of 8

What is the evidence in the diagram and table that supports the hypothesis that the product of gene APETALA-2 represses the expression of gene AGAMOUS in whorls 1 and 2?

Question 6 choicesChoice A., the presence of protein C in whorls 1 and 2 when gene APETALA-2 is mutantChoice B., the presence of protein A in whorls 1 and 2 when gene AGAMOUS is mutantChoice C., the presence of protein A in whorls 3 and 4 when gene AGAMOUS is mutantChoice D., the presence of protein C in whorls 3 and 4 when gene APETALA-2 is mutantChoice E., the absence of protein B in whorls 2 and 3 when genes APETALA-3 or PISTILLATA are mutant

Correct.

Incorrect.

Question 7 of 8

What is the evidence in the diagram and table that supports the hypothesis that the product of gene AGAMOUS represses the expression of gene APETALA-2 in whorls 3 and 4?

Question 7 choicesChoice A., the presence of protein C in whorls 1 and 2 when gene APETALA-2 is mutantChoice B., the presence of protein A in whorls 1 and 2 when gene AGAMOUS is mutantChoice C., the presence of protein A in whorls 3 and 4 when gene AGAMOUS is mutantChoice D., the presence of protein C in whorls 3 and 4 when gene APETALA-2 is mutantChoice E., the absence of protein B in whorls 2 and 3 when genes APETALA-3 or PISTILLATA are mutant

Correct.

Incorrect.

Question 8 of 8

Which mutation(s) result in the absence of petals and stamens?

Question 8 choicesChoice A., AGAMOUSChoice B., APETALA-2Choice C., AGAMOUS and APETALA-2Choice D., APETALA-2 and PISTILLATAChoice E., AGAMOUS and PISTILLATA

Correct.

Incorrect.

Assessment Summary

Activity results are being submitted...