Download Name Period ______ Date ______ Genetics Assessment When

Name ________________________
Period _________ Date __________
Genetics Assessment
1. When gardeners breed cross pollinate flowers different outcomes are
possible depending on how the traits are passed on. For each scenario
Identify what kind of inheritance is shown
Explain why the outcome is what it is.
Show a punnett square to illustrate the cross.
A) A red flower is crossed with a blue flower and all the offspring
are red.
B) A red flower is crossed with a bue flower and all the offspring
are purple.
C) A red flower is crossed with a blue flower and all the offspring
are striped (red and blue).
2. When studying pea plants Gregor Mendel identified tall was dominant over
short and plants were either one or the other. In humans there is a great
variety of heights – Explain why this is.
3. Two normal people had a child with cystic fibrosis, a recessive disorder.
What does this tell you about the parents and how is it possible they did
not know they carried this disease. Use a punnett square to illustrate your
answer.
4. Diagram the process of fertilization for an organism that has 16
chromosomes in its body cells.
5. Use the pedigree below to answer the following.
A) How many people have the trait?
B) How are the carriers? What do they all have in common?
C) If one of Alexandra’s daughters had a hemophiliac son – what
would her symbol be?
D) Show a Punnett square for Prince Albert and Queen Victoria.
E) From the Punnett square what probability was there that they
would have a hemophiliac son? How does this compare with
their actual children?
6. Use the following information to answer the questions
Pat and Sue have 3 children – 2 females and 1 male
One of these girls shows the trait.
Their son marries and has 3 children – 1 female and 2 males.
2 of his sons have the trait.
A) Construct a pedigree for the family.
B) Identify the carriers
C) Infer whether this trait is sex-linked or not. Explain why.