Genetics

What is heredity?

• A kind of genetic disorder
• The way DNA divides
• A trait you inherit from your parents
• The passing down of traits from parents to children

Why are your chromosomes arranged in pairs?

• Scientists have no idea
• Because you get one from your mom and one from your dad
• Because pairs can divide easier
• Because DNA is awesome

Inherited traits are controlled by 

• genetic information in the genes
• the environment a baby is born into
• the nucleus and mitochondria
• none of the above

The two types of alleles are (select two)

• dominant

• doughnut

• expressive

• recessive

Which of the following is heterozygous

• FF
• tt
• Gg
• RR

Which of the following is homozygous recessive?

• rr
• AA
• TT
• Ff

Which of the following is homozygous dominant?

• Jj
• Rr
• MM
• ee

The physical appearance of a trait is known as the-

• genotype
• phenotype
• characteristics
• intelligence

How many letters does a genotype contain?

• 1
• 2
• 3
• 4

Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's phenotype?

• Brown Hair
• Blonde Hair
• Brown and Blonde Hair
• Black Hair