Genetics Part II Exam

Name: Genetics Review Date: Class: 3/4 5 6 7

What are the sides of a DNA molecule made up of? During which phase does the copying of DNA occur? What are the middle “rungs” of the DNA ladder made up of? What are the 4 bases that are found in DNA? Adenine pairs with Guanine pairs with Cytosine pairs with Thymine pairs with What is another name for a sex cell? In meiosis, what happens to the number of chromosomes? How many sex cells are produced during meiosis? What is a mutation? Are all mutations harmful? How many pairs of chromosomes do humans have? How is asexual reproduction different than sexual reproduction? What are the male sex chromosomes? What are the female sex chromosomes? Who were the scientists who discovered the shape of DNA? What is the shape of DNA? Which of the following traits is controlled by multiple alleles in humans? a. sickle-cell anemia c. hemophilia b. blood type d. pattern baldness

What would be the blood type of a person who inherited a B allele from one parent and an O allele from the other parent?

Two newborn babies are accidentally mixed up at birth. Your job is to properly identify the last name of each child using only the information supplied regarding the blood types for the parents and children.

Mr. Macland is Type A Mr. Holland Type AB Mrs. Macland is Type B Mrs. Holland Type O

Baby #1 Blood Type O Baby #2 Blood Type A Last Name: Last Name:

1 Name: Genetics Review Date: Class: 3/4 5 6 7

Why are males more likely than females to have a sex-linked trait that is recessive? List a sex linked trait that we have talked about? What do you call the chart that can trace a trait through your family tree? What causes genetic disorders? What do we call a “picture” of chromosomes which may be used to identify genetic disorders? Make a pedigree from the following information: The Smith family is known to have colorblindness in their family. The Smith family is made up of a father and a mother. They had 2 sons and a daughter. Each child married. The oldest son had 2 boys. The daughter had 2 daughters and a son, and the youngest son had no children with his first wife, but had a son and a daughter with his second wife. If the father of the Smith family was color blind, trace colorblindness through the family.

What genetic disorder results from abnormally shaped blood cells? a. hemophilia c. Down syndrome b. cystic fibrosis d. sickle-celled anemia What procedure helps doctors diagnose a genetic disorder before a baby is born? a. genetic engineering c. selective breeding b. amniocentesis d. cloning

______helps to solve crimes because no two people, except identical twins, may have the same DNA.

1 Name: Genetics Review Date: Class: 3/4 5 6 7

In dogs, wavy hair [CS] results by the codominant situation of _____ % curly curly hair [C] and straight hair [S]. What are the possible results _____% straight if a curly-haired male dog and a wavy-haired female dog have puppies? _____% wavy

In the 4 o’clock flower, purple [P] is incompletely dominant _____% purple over white [W]. What would be the results of a cross if both parents were pale lavender [heterozygous – PW]? _____% white

_____% lavender

In horses, red [R] is incompletely dominant over white [W]. _____% red Roan is the name of the color that results from incomplete _____ % white dominance. What are the possible results if a white male mates with a roan female? _____ % roan

_____ % white In the daisy flower, white [W] and yellow [Y] colors are _____ %purple codominant, and results in a yellow and white striped flower when both genes are present. What are the possible results ____ % striped from the cross-pollination of a striped daisy with a white daisy?

Complete the Punnett square for the following cross. Mr. Fenton decided he wants to cross a yellow rose and a red rose. What possible colors will the new flowers have if yellow and red are not dominant colors over each other? Red = R Color(s): Yellow = Y