Genetics

Why is DNA important?

• It teleports cookies to my locker.

• It carries the instructions for our cells.

• It allows me to be invisible.

• It gave us a snow day in August.

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains uracil

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 

• 0%
• 25%
• 50%
• 75%

What is the probability of heterozygous offspring?

• 25%
• 50%
• 0%
• 100%

If a heterozygous parent and a homozygous recessive parent mate, what percentage of their offspring will be dominant?

• 25%

• 50%

• 75%

• 100%

What does a filled in square represent?

• Not affected Female
• Not affected Male
• Affected Male
• Affected Female

What does an open circle represent?

• Not Affected Male
• Not Affected Female
• Affected Male
• Affected Female

If a trait SKIPS a generation, it is an indication that the trait is....

• dominant
• recessive
• incompletely dominant
• co-dominant

Objective #13

This is a pedigree that follows blue eyes which is a recessive trait. What is the phenotype of the mother in generation 1?

• Brown

• Blue

• 1 blue, 1 brown