7th grade mid-term study guide quiz #2

Answers are highlighted in red.

1. Mokey the Fraggle is working with a team of scientists to study the rock formations at the
Red River Gorge. She stops at a big, rocky arch and writes:

The rocks on this arch are brown and gray in color. They feel crumbly and soft.”
Is this statement an OBSERVATION or an INFERENCE?

2. Mokey continues to hike through the gorge and sees two sets of footprints on the trail ahead of her. She says:

I am guessing a duck and a raccoon made friends, since their footprints are side by side!
Is this statement an OBSERVATION or an INFERENCE?

3. In Fraggles, there is a single gene that controls skin color.
The dominant phenotype is blueish/purple skin, and the recessive phenotype is
orange skin. Bubber is heterozygous for this trait. Red is homozygous recessive.
GIVE Bubber and Red’s GENOTYPES.
Use the letter “K” or “k” to represent the skin color gene.

BUBBER - Kk

RED- kk

4. Do a punnett square crossing Bubber, whose genotype for skin color is Kk, and Mokey,
who’s genotype for skin color is kk.

5. If Mokey and Bubber were to mate and have 4 fraggle babies, make an educated guess as to how many of them would show the recessive trait for skin color (orange skin). This is the one question you should answer in complete sentences! Use data from your answer to question #4 to support your answer to this question.
If Mokey and Gobo were to mate and have 4 fraggle babies, 50% of their fraggle babies would be orange skinned, because all of the possible outcomes, 2 of the 4 have the dominant gene for skin color.