Genetics Basics

What is an allele?

• A slippery, long animal that lives in the water

• a version of a trait

• a kind of cell that has DNA

• If I told you the answer, how are you ever going to learn?

Which of the following are PHENOTYPES?

• red hair

• Gg

• seven toes

• SS

• cc

Which of the following are GENOTYPES?

• crooked pinky finger

• Dd

• QQ

• Orange teeth

• ff

Tags

NGSS.HS-LS3-2

Which of the following represent DOMINANT alleles?

• D

• Q

• v

• P

• u

Tags

NGSS.HS-LS3-2

Which of the following represent recessive alleles?

• R

• r

• T

• H

• y

A genotype with two dominant alleles is known as:

• Homozygous dominant

• homozygous recessive

• heterozygous

A genotype with two different alleles is known as:

• homozygous dominant

• homozygous recessive

• heterozygous

Which genotype is homozygous recessive?

• BB

• tt

• Cc

Which of the following is a homozygous dominant genotype?

• tt

• gg

• WW

• Xx

In pea plants, plant height is a genetic trait. Tall (T) is dominant over dwarf (t). Which genotype would produce a dwarf plant?

• TT

• Tt

• tt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2