Biology Blood Types And Heredity (Page 3 of 4) in pdf

Biology Blood Types And Heredity Page 3

2. Add 20 ml of each kind of “blood” to a test tube. One tube will be empty. It

will be the “test” tube.

3. Start with “A” or red blood. Add 5 ml of “A” blood to the empty test tube.

Then add 10 drops more of “A” blood. Look for a color change. Since red + red

= red, write “safe” on the data table to show no change.

4. Continue adding by adding 5 drops of “B” blood to the “A” blood. If there is a

color change, write down “unsafe” on the data table. Empty the test tube and

start over with 5 ml of “A” blood then add 5 drops of the AB and then O. Every

time you get a color change, empty the test tube.

5. Do the same thing for B, AB and O blood. Record your findings.

Data:

Donors

Receivers

Analysis:

Summarize this data by filling in this chart to showing which transfusions are safe

or unsafe:

If you have blood type:

You can donate to:

You can receive from:

Going On-

Accurate blood tests were soon developed so that people could be transfused

with the correct blood types for them. But the question of how blood type was

transferred genetically was still unknown. Like most questions in genetics, the

answer was found by first looking at family pedigrees. Look at the pedigree on

the next page and see what clues it offers.

Biology Blood Types And Heredity Page 3