STAAR Biology

Round seeds (R) are dominant over wrinkled seeds (r). What percentage of the offspring will be round from the following cross?
Rr X Rr

• 100%

• 75%

• 50%

• 25%

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?

• 25%

• 0%

• 100%

• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r  = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds? 

• 0%

• 25%

• 50%

• 100%

When Grey fur is dominant to brown fur the Genotypic Ratio for the cross between a heterozygous mouse and a brown mouse is

• GG 1: Gg 2: gg 1

• Grey 3: Brown 1

• GG 0:Gg 2:gg 1

• Grey 2: Brown 2

Tags

NGSS.MS-LS3-2

Which of the following is the complementary mRNA sequence to this DNA strand: AACTGAA

• UUGACUU

• TTGACTT

• AACTGAA

• AACUGAA

Match the following terms...

• mRNA

• protein synthesis

• tRNA

• anticodon

• to make more proteins

• codon

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

What is the amino acid sequence for the following mRNA strand:

Tags

NGSS.HS-LS1-6

Natural selection results in change in a population's _____________ traits over time.

• inherited

• acquired

Tags

NGSS.MS-LS4-4

Which best describes the phrase survival of the fittest?

• strongest in a population are most successful

• fastest in a population are most successful

• those that can survive and reproduce are most successful

• those that can live the longest are most successful

Tags

NGSS.MS-LS4-4

Which is true?

• allele Z increased in the population over time

• allele Z decreased in the population over time

• the frequency of allele Z remained constant in the population over time

Tags

NGSS.MS-LS4-4