Inheritance And Probability (Page 5 of 7) in pdf

Inheritance And Probability Page 5

EST YOUR HYPOTHESES BY

ONDUCTING A GENETIC

ROSS

Now you will conduct a genetic cross with your partner, record the results, and determine whether your

actual results

support your hypothesis.

You will be given 2 sacks of checkers. One represents the male

black-eyed mouse and the other

represents the female

black-eyed mouse. Each sack contains an equal number of black checkers

(representing gametes with the

dominant

black-eye gene) and red checkers (representing gametes with

the

recessive

red-eye gene) because both the male and female are Bb.

Draw

checker/gamete from the “Mom” sack while your partner draws

checker/gamete from the

“Dad” sack.

your answer in the chart below. If you pulled a black checker,record a

for a black

ECORD

gene. If you pulled a

red

checker, record a

for a

red

gene. This is your

offspring.

2nd

3rd

4th

RIAL

offspring

Mom’s genes

Dad’s genes

Return the gametes (checkers) to the exact bags from which they were drawn and shake them up.

steps

and

(3)

more times. R

the results for the

, 3

and

EPEAT

THREE

ECORD

offspring

in the correct boxes above.

For each of the four offspring you created in

1, record the gene combinations (BB, Bb, or

RIAL

bb) and the eye colors (black or red) in the spaces below.

offspring

RIAL

Gene combination:

____________ ____________ ___________

___________

Eye color:

____________ ____________ ___________

___________

OW WELL DID YOUR ACTUAL RESULTS FIT YOUR HYPOTHESIS

In Trial #1, how many of your offspring had:

2 genes for black eyes (BB)? _________

1 gene for black eyes and 1 for

red

eyes (Bb)? __________

2 genes for

red

eyes (bb)? __________

Based on your hypothesis, you predicted that you would get 1

black eyed mouse,

black eyed mice, and 1

red eyed

mouse. Did your

actual results

support your

hypothesis?

YES

genetics data sheet 17 Dec. 03

Savannah River Ecology Laboratory [

Inheritance And Probability Page 5

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