Genetics Test Review

What is a gene? 

• non-hereditary traits such as learned behaviors
• a string of mitochondria
• a single cell organism
• a hereditary unit consisting of DNA

What are genes made of? 

• DNA 
• chromosomes
• cells
• traits

Where are chromosomes located? 

• nose
• DNA
• nucleus
• brain

Molly's mom and dad can both roll their tongues, but Molly cannot. Why? 

• She has 2 dominant traits fro tongue rolling
• She has 1 dominant trait and 1 recessive trait for tongue rolling
• She has 2 recessive traits for tongue rolling
• She bit her tongue when she was little

Can learned behaviors determine what you look like? 

• Yes, because you can learn to change what you look like. 
• No, only inherited traits determine what you look like. 
• Yes, they are determine by your DNA. 
• No, learned behavior can only occur in animals. 

Sea turtles lay their eggs in the sand on the beach. When the eggs hatch, the babies know to go to the water. This is an example of ____________. 

• hibernation
• instinct
• camouflage
• learned behavior

Which of these is a characteristic of an inherited trait? 

• becoming a gymnast
• having black hair and blue eyes
• the ability to sing
• mastering multiplication facts

Which of these is not an instinctive behavior? 

• a bird flying south for the winter
• dogs pulling a sled
• a turtle burying its eggs
• bears hybernating

When Mrs. Drake was young she had blonde hair. When she got older, she dyed her hair red. Will she pass this red-headed trait to her children? 

• Yes, red hair is a dominant trait
• No, they will have their father's hair
• Yes, it is a part of her genes now
• No, dyeing hair does not change your genes

If a shark bit off one flipper of a seal but survived the attack, will her pups be born with only one flipper? 

• No, all mammals have flippers
• No, the gene for 2 flippers is still in the seal's DNA
• Yes, her DNA was changed by the shark bite
• Yes, because the flipper was bitten off