Genetics

What controls the way you look?

• your mom

• Old Navy

• genes

• jeans

What is the physical appearance of a trait called?

• genotype

• hybrid

• phenotype

• purebred

The form a gene takes (either dominant or recessive).

• phenotype

• homozygous

• allele

• chromosome

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-LS3-1

NGSS.HS-LS3-2

What are the 4 chemicals used in DNA?

• A, B, C, D

• L, M, N, O

• A, T, C, G

• H, E, L, P

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.

A tool used to predict traits inherited by offspring.

• a microscope

• the Punnett square

• a mathematics table

• a Venn diagram

Traits

• are specific physical characteristics

• can be inherited

• can be someone's eye color or hair color

• all of these choices are true about traits

Which is an example of a homozygous dominant allele?

• Tt

• aa

• AA

• Aa

Which of the following represents a heterozygous allele?

• TT

• tt

• aa

• Aa