Traits and Probability

the genetic make-up of an organism for a trait (the two genes that were inherited for a particular trait); it cannot be seen

• genotype

• phenotype

are traits that fade into the background and only show if not with a "stronger" trait (represented with little letters; ex. Bb)

• dominant traits

• recessive traits

• incomplete dominance

an organism that has two different alleles for a trait

(Ww)

• heterozygous

• homozygous

• hybrid

• purebred

Red hair (R) is dominant over blond hair (r). What is the probability of two heterozygous, red-haired parents producing a blond hair child?

• 0% probability

• 25% probability

• 50% probability

• 100% probability

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Why do recessive genes show up in an offspring?

• One of the parents carries the recessive gene.

• Both parents carry the recessive gene.

• The gene mutated.

• Recessive genes never show up in offspring.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A tool used to predict traits inherited by offspring.

• a microscope

• the Punnett square

• a mathematics table

• a Venn diagram

If B = brown hair and b = blonde hair, what is the probability of blonde hair?

• 100%

• 50%

• 25%

• 75%

Tags

NGSS.HS-LS3-3

Which of the following is homozygous dominant?

• BB

• Bb

• bb

Which of the following is homozygous recessive?

• AA

• Aa

• aa

Which of the following is heterozygous?

• TT

• Tt

• tt