1. Unit 5 Mendelian Genetics
Test Review

2. Which of the following is a possible abbreviation of a genotype: a
Which of the following is a possible abbreviation of a genotype: a. BC b. Pp c. Ty d. fg Pp

3. Which of the following is a possible abbreviation of a genotype and explain why: a. BC b. Pp c. Ty d. fg
Pp- they represent alleles of the same gene (p) so naturally it should be represented by the same letter!

4. Which statement is not true. A. genotype determines phenotype B
Which statement is not true? A. genotype determines phenotype B. phenotype determines genotype C. a phenotype is the physical appearance of a trait in an organism D. alleles are different forms of the same gene
B is not true.

5. Draw an example of a cross between homozygous dominant and homozygous recessive parents:
AA homozygous dominant
aa homozygous recessive

6. What percent will the offspring by heterozygous?
100% Aa

7. What are Mendel’s Laws that are showcased in the formation of gametes?
Law of Independent Assortment
Law of Segregation

9. Which of the following is caused by a chromosomal disorder: a
Which of the following is caused by a chromosomal disorder: a. cystic fibrosis b. Down’s syndrome c. Tay-sach’s disease d. Huntingdon’s disease
Down’s syndrome

10. What is one type of chromosomal abnormality that causes Down’s syndrome?
Trisomy 21

11. Which of the following would be found in a gamete (sperm or egg cell)?
Haploid

12. List 2 homozygous dominant disorder.
Achondroplasia
Huntingdon’s disease

13. List 2 homozygous recessive disorders.
Cystic fibrosis
Sickle-cell

14. What type of chromosomal abnormality is associated with part of a chromosome breaking away and attaching to a non-homologous chromosome?
translocation

15. What type of chromosomal abnormality is associated with part of a chromosome breaking away and reattaching to the same chromosome but in reverse?
inversion