Bell Work 3/28 - Genetics Review

What type of letters are used to show a trait is dominant?

• capital

• lowercase

An organism's genotype describes its __________.

• genetic makeup

• physical appearance

An organism's phenotype describes its __________.

• genetic makeup

• physical appearance

Which trait does a puppy inherit from its parents?

• fur color and pattern
• obedience to commands
• food brand preference
• affection for a specific home

B = brown fur b = white fur

In the punnett square, what is the probability for white fur?

• 0%

• 25%

• 50%

• 75%

Dominant or recessive?
tt

• Dominant 
• Recessive

T - tall and t = short

In the punnett square below, what belongs in the missing square

• tt

• Tt

• Bb

• TT

In a certain species of plant, the color purple (P) is dominant to the color white (p).

According to the Punnett Square, what is the probability of an offspring being purple?

• 25%

• 0%

• 100%

• 50%

We all have two alleles, or versions, of each gene. Being ​ (a)   for a particular gene means you inherited two identical versions. It's the opposite of a ​ (b)   genotype, where the alleles are different. People who have recessive traits, like blue eyes or red hair, are always homozygous for that gene.

• homozygous
• heterozygous