Monohybrid crosses
1. Being weird is dominant to being normal (normal is recessive). A
heterozygous weird male and a normal female have a child. What is the
probability that they will have weird children?
2. Being a hero is dominant to being a spineless coward. If a female hero
and a male spineless coward have children, what are the odds that their
children will be spineless cowards? (Assume mom is heterozygous)
3. Liking rap music is dominant to liking elevator music. Suppose a male
who is homozygous for liking rap music has a child with a female who likes
elevator music. What kind of music will their children listen to?
4. Being a weakling is dominant to being a sports hero. Two heterozygous
weaklings want to have a child. Can their child be a sports hero? What are
the odds?
5. Being a whiner is recessive to being happy. Can two whiners have a
happy child? Show why or why not.
6. Suppose a couple had two children with blue hair and two children with
yellow hair. Blue hair is dominant to yellow hair. What color hair do the
parents most likely have?
7. Having a mohawk is dominant to being bald. Suppose a couple has four
children who are bald. Would either of their parents have mohawks?
Show why or why not.
8. Having big, pointy teeth is dominant to having small, rounded teeth. A
couple has 3 children with big, pointy teeth, and 1 child with small,
rounded teeth. What kind of teeth do the parents most likely have?
9. Having wheels for feet is dominant over having suction cups for feet. A
family has two kids with suction cups for feet and two kids with wheels
for feet. What kind of feet do the parents most likely have?