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RELEASED

In a particular species of plants, when the soil pH is greater than 7, blue flowers are produced. However, when the soil pH is less than 7, pink flowers are produced. Which statement best explains the color change in the plant?

A

Multiple alleles determine the color of the flowers.

B

The change in flower color is a result of a mutation.

C

Polygenic inheritance produces the different flower colors.

D

The environment influences the expression of the gene for flower color.

Due to independent assortment, what is the possible genetic make-up of gametes produced by this organism?

A

SsTt

B

Ss, Tt

C

S, s, T, t

D

ST, St, sT, st

NCDPI

49.

50.

A cloned plant has a diploid chromosome number of 12. What is the diploid chromosome number of the plant cell that was used to produce the cloned plant?

A

6

B

12

C

18

D

24

When worker bees return to the hive, they perform a sequence of movements called a waggle dance to show other members of the colony where food is located. Which type of behavior does this best illustrate?

A

aggressive behavior

B

courtship behavior

C

social behavior

D

territorial behavior

52.

North Carolina Test of Biology. Form I RELEASED Fall 2009

s

51.

This diagram shows a diploid cell with two pairs of homologous chromosomes.

T

S

t

Page 23

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