1. Simple Inheritance
1. Brown Hair is dominant. What are the odds of a heterozygous and homozygous recessive individual having a child that is also heterozygous for brown hair?
If a couple have 20 kids and they are all heterozygous for brown hair, use a Punnett square to show the most likely genotypes of the parents.
One parent is UU and the other is Uu for unibrow, which is dominant. What are the phenotypic ratios for this cross?

2. Co-Dominance
A certain species of moth is orange, black, or both orange and black. An orange moth and a black-orange moth produce 500 offspring. How many of each possible phenotype can you expect?
A brindle dog is black and tan. If two brindle dogs mate, what would the phenotypic offspring be?

3. Incomplete Inheritance
A certain species of gerbil comes in three varieties – black, gray, and white. A black and a gray gerbil mate and produce 10 offspring. How many gray gerbils will they most likely produce?
David has curly hair (CC) and Susie has wavy hair (SC). What are the phenotypic ratios of their offspring?

4. X-Linked
8. Color blindness is an x-linked recessive disorder and normal color vision is dominant. Mom is color blind and dad sees normal color. What are the odds their daughters will be color blind? What about their sons?
9. XBXO and XOY are two cat parents expecting kittens. Coat color exhibits co-dominant inheritance. What are the phenotypic ratios of their offspring?

5. Blood Typing
A CSI team is investigating a crime scene. Video shows four people entering and exiting during the hour of the crime. Allen, Bubba, Charlie, and Debbie were seen and have mysteriously all left town. The CSI team tracked down their parents. The parent genotypes of the parents were as follows: Allen – AB and OO, Bubba – AB and AO, Charlie – BO and AA, and Debbie – OO and BB. If type O blood is found at the crime scene, which suspects can be ruled out?
David’s wife is type A blood and David is type B blood. What are ALL of the potential phenotypes of the their offspring?

6. KNOW THESE DEFINITIONS!!
A. Homozygous B. Punnett square C. agglutinate
D. Heterozygous E. allele F. gene
G. TT H. Tt I. tt
J. Dominant K. recessive L. co-dominant
M. Incomplete dominance N. loci O. antigen
Antibody Q. rh R. Monohybrid
S. Genotype T. Phenotype
Match the descriptions below to the proper terms from the word bank.
If this allele is present, it WILL show up in the phenotype.
A general reference to something on a chromosome that is inheritable.
Meaning “one of each” allele
A tool used to help determine a cross’s genotypes.
To clump up or group together
Meaning only one type of allel
A code (or segment) on a chromosome that calls for a specific representation of a trait
A genotype that means homozygous recessive
A genotype that means heterozygous
A genotype that means homozygous dominant
Often referred to as a “hidden” trait or one that does not show up in the presence of an allele that is dominant
Something in your body that tries to get rid of the bad stuff
A specific location on a chromosome where an allele can be found
Anything that is not supposed to be in your body (or something recognized as bad)
An inheritance type where both phenotypes can be present on the same individual
A term that describes the appearance of traits in an individual
An inheritance type where a new, blended phenotypes shows up in an individual
The protein found in some blood
Crosses dealing with just one trait
The combination of alleles (or all of the allele combination that an individual has)