LAB: MOUSE GENETICS (TWO TRAITS)
Throughout the reflection, make sure you have a copy of the Student Guide and your
data table.
In your experiment, you tested this hypothesis:
Hypothesis: If a mouse inherits a particular form of one trait, then the inheritance of the
other trait will not be affected because alleles assort independently.
The hypothesis would not have been supported by the data if
traits independently assorted in approximately a 9:3:3:1 ratio.
the traits for white fur and red eyes were always inherited together.
all the F1 offspring had the same phenotype. CORRECT ANSWER the traits for white
fur and red eyes were always inherited together.
Below is data for 250 offspring mice, as produced in a laboratory.
Notice that the predicted percentages and laboratory percentages are not the same.
These differences most likely result from. CORRECT ANSWER Expected randomness
A cross was performed, and the offspring shown to the right were produced. What is the
most likely genotype for the parents?
Bbee × bbEE
BbEE × Bbee
BbEe × BbEe
BBEE × bbee CORRECT ANSWER BbEe × BbEe
Select all the offspring phenotypes that could be produced from a BbEE x bbee cross
(shown above).
black fur, red eyes
black fur, black eyes
white fur, black eyes
white fur, red eyes CORRECT ANSWER black fur, black eyes
white fur, black eyes
Cross a parent that is homozygous recessive for both traits (bbee) with a dihybrid
(BbEe).
First, draw a Punnett square in your notes.
For each offspring in the Punnett square, determine the phenotype.
In other words, what are the fur color and eye color?
