genetics

Which of these is NOT an instinctive behavior?

• a bird building a nest

• a turtle burying its eggs

• a baby crying when they are hungry

• a farmer teaching a horse to pull a plow

Which of these are characteristics of inherited traits?

• being able to speak in front of a crowd

• having green eyes and brown hair

• mastering your multiplication facts

• becoming a teacher

A person who breeds animals keeps careful records of the fur color of parents and offspring from each generation. The fur color is a trait transferred from generation to generation.

What are the structures that carry the information for these traits called?

• organelles

• genes

• muscles

• cytoplasm

What is the chemical called that is found inside our cell's nucleus and determines our inherited traits?

• D.N.A.

• genes

• chromosomes

• chloroplast

A characteristic passed from parents to their offspring is called a __________________ trait.

• acquired

• inherited

• dominant

• recessive

Which of the following is an example of an inherited trait?

• liking pizza

• riding a bike

• blowing bubbles with your gum

• freckles

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

• homozygous
• hetrozygous
• protein
• chromosome

Incomplete dominance means that the traits are

• expressed equally
• dominant
• recessive
• blended

Which of the following genotypes is homozygous dominant?

• Yy

• yY

• yy

• YY

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

• 50 % Brown fur and 50% White fur

• 25 % Brown fur and 75% White fur

• 75 % Brown fur and 25% White fur

• 0% Brown fur and 100% White fur