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

How many pairs of chromosomes exist in each of your cells?

• 10
• 12
• 23
• 46

Besides genetics, what other factors are responsible for how you will grow and develop?

• How people treat you
• How hard you study
• Nutrition and environment
• What your parents look like

Which trait is completely determined by your DNA?

• Your personality
• Your intelligence
• Your natural hair color
• Your weight

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

Genotype refers to the ...

• physical expression of the genes
• the possible combination of alleles in a gene
• whether an allele is dominant or recessive
• how an organism will appear

What is a phenotype

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

having two of the same genes for the trait (sometimes called purebred).

• homozygous
• hetrozygous
• protein
• chromosome

having two different genes for a trait (sometimes called hybrid).

• protein
• homozygous
• heterozygous
• genotype

What does heterozygous mean?

• An organism that has the same genes for a trait (TT or tt)
• An organism that has different genes for a trait (Tt)
• When neither gene is fully dominant; offspring is a mixture of both
• the different forms of a trait (hair color--> brown, blonde, red