Name ____________________________________ 3/10/17 Period _____
Genetics study guide
Vocabulary
1. The passing of information from parent to offspring is called ______________ (Slide 6)
2. Instructions for an inherited trait are called _________________ (Slide 6)
3. Different forms of the gene are called ___________________ (slide 7)
4. The stronger trait is known as the _________________ trait. (slide 9)
5. The weaker trait is known as the _________________ trait. (slide 9)
6. When the alleles are the SAME the genotype is known as ______________ or ______________ (slide 10)
7. When the alleles are DIFFERENT the genotype is known a _____________or ______________ (slide 10)
8. The genetic makeup (letters) is called the ____________________ (slide 11)
9. The physical appearance is called the _____________________(slide 11)
10. A chart that shows all the possible combinations of alleles is called a
_________________________________ (slide 12)
11. The chance that something is going to happen is called _________________ (slide 12)
Now you try it….
Key:
_____=brown=dominant Parent 1: ____
_____=blue=recessive Parent 2: ____
Other information
12. How many chromosomes do humans have? _____________ (Slide 27)
13. What percentage of DNA do you get from each parent? _______ (Slide 27)
14. Where does the DNA in the mitochondria come from?_____________ (Slide 29)
15. An egg and sperm come together to produce a _____________________ (Slide 30)
16. What carries the genetic information? __________ Where is it located? _________________ (Slide 30)
PRACTICE
1. Oompahs generally have blue faces which is caused by a dominant gene.
Having an orange face is recessive.
A homozygous blue faced man marries an orange faced woman.
Use the letter B for this problem.
Write the key and make a Punnett square.
Key: BB and Bb = orange bb = blue
Parents __________ x _____________
a) What are the possible genotype(s) for the children?
b) What are the possible phenotype(s) for the children?
c) What are the chances that the children will have a blue face? _______%
d) What are the chances that the children will have a orange face? _______%
2. Brown eyes are dominant to blue eyes.
Two brown eyed guinea pigs mate and have 4 children.
Two have brown eyes and two have blue eyes.
What are the genotypes of all the family members?
Write the key: ________________= brown ________________=blue
Parents __________ x _____________
a) Children/offspring with brown eyes ____________
b) Children/offspring with blue eyes ______________