Genetics!

What is genetics?

• The study of DNA nucleotides
• The study of heredity
• The study of a cell dividing into 2
• The study of eye color

What is heredity?

• How different genes and traits are passed down from parents to children
• How different genes and traits are passed down from children to parents
• How traits are identical to parents
• How traits are different between siblings 

What is a gene?

• An entire chromosome that  codes for a trait
• a piece of clothing
• a piece of a DNA on chromosome that codes for a trait
• Chemical messengers in your brain that code for a trait

What is a genotype? 

• The genetic make up (code)
• The physical trait

What is a phenotype

• The genetic make up (code)
• The physical trait

What is a dominant allele?

• A trait that is always shown (capital letter)
• A trait that can be hidden (lower case letter)
• Alleles that are the same
• Alleles that are different

What is a recessive allele?

• A trait that is always shown (capital letter)
• A trait that can be hidden (lower case letter)
• Alleles that are the same
• Alleles that are different

Homozygous or heterozygous?
BB

• Homozygous
• Heterozygous

Dominant or recessive?
tt

• Dominant 
• Recessive

Which of the following pairs is homozygous dominant?

• Hh
• pp
• HH
• aa