2nd Semester Final Review

The "Father of Genetics"

• Isaac Newton
• Gregor Mendel
• Albert Einstein
• Robert Hooke

The term for the different forms of a trait. 

• DNA
• Chromosomes
• Genes
• Alleles

The trait that always shows. 

• Dominant 
• Recessive
• Hidden
• Overt

The hidden trait.  You need two of these alleles for the trait to show.

• Dominant
• Recessive
• Hidden
• Overt

The genetic makeup of a trait.  (The letters represent this)

• Genes
• Phenotype
• Genotype
• Characteristics

If a trait is homozygous the letters are the 

• Same
• Different

If you are homozygous dominant, the genotype would be 

• AA
• aa
• Aa

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous genes
• mutated DNA

When a person has two different alleles for a gene, they are said to be

• heterozygous
• homozygous

What are the possible genotypes for this cross?

• TT = 25% Tt= 50% tt=25%
• all tall
• TT= 75% tt = 25%
• Tt = 100%