Leader: Adam
Course: Bio 211 (2)
Instructor: Wilsey
Supplemental Instruction
Date:
Iowa State University
1. Variation in the number of sets of chromosomes is called?
Chapter 16
Mendelian Genetics
Lethal condition in __________
Common in _________
2. A variation in the number of a particular chromosome within a set is (a single
chromosome) is called?
This may result from ________ during Meiosis II
What is one common example of this chromosome abnormality?
3. Cancer and Tumors
Match the terms with the correct definition.
I.
_____________: Grows and spreads (Cancer)
A. Benign
II.
_____________: Stay in one spot
B. Malignant
III.
_____________: Movement of cancer cells to a different part of the body C. Metastasis
4. What is a P generation, F1 generation, and F2 generation
5. What is the phenotypic and genotypic ratio in the F2 generation when crossing two truebreeding parents for a single trait (a monohybrid cross)?
6. Describe Dominate and Recessive traits
7. Every individual carries how many genes for a given character?
Supplemental Instruction
1060 Hixson-Lied Student Success Center  294-6624  www.si.iastate.edu
8. Genes for each character exist in two variant forms, called ________.
9. Law of segregation: When do alleles segregate?
10. Describe the following terms:
a. Homozygous:
b. Heterozygous:
c. Genotype:
d. Phenotype:
11. A testcross can determine the __________ of an organism that has a __________
phenotype, but an unknown ____________.
Example: You have been experimenting with this new flower for some time now. You know that
a Blue flower is dominant over the yellow flower type. You cross two heterozygous blue flowers
with each other. What would you expect the ratio of prodigy to be in terms of flower color for
both phenotype and genotype? Now you take one of the Blue flowers that grew and test cross it
with a yellow flower. You find that now you get all Blue flowers. What was the genotype from
the blue flower that you used in the test cross?
12. Dihybrid Cross, looks at the inheritance of two genes that are found on different
chromosomes. In order to do these crosses effective do utilize probability.
a. If the word “and” is used you _________ the probabilities
b. If the word “or” is used you __________ the probabilities
c.
Ex: If you were asked to find the outcome for a trihybrid cross, you will most likely be
given the individual probability of each trait for a monohybrid cross. Then multiple each
probability together, for example let’s pretend it comes out to .18 If the question has a
certain number of offspring and wants to know how many to expect will have that
specific three traits. Take the total number of offspring times .18 and then you will get the
answer.