Genetics and Heredity

D = dimples        d = no dimples 
What is the genotype for a homozygous recessive offspring?

• DD
• Dd
• dd

Tags

NGSS.HS-LS3-1

Round (R) seeds are dominant to wrinkled (r) seeds.
What is the genotype for a homozygous dominant offspring?

• RR
• Rr
• rr

Tags

NGSS.HS-LS3-1

If two purebred species (BB) are crossed, what percentage of their offspring would be BB?

• 25%
• 50%
• 75%
• 100%

Tags

NGSS.HS-LS3-1

What type of traits "show up" in a population more often?

• dominant
• recessive
• punnett squares
• alleles

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-3

What do you call the physical expression of a gene?

• genotype
• dominant
• phenotype
• allele

Tags

NGSS.HS-LS4-4

NGSS.HS-LS1-1

Short hair (S) is dominant to long hair (s).
What is the genotype for an offspring with long hair?

• SS
• Ss
• ss

Each parent contributes one of the genes for a particular trait. The genes of the pair are called:

• variables
• gametes
• hybrids
• alleles

Tags

NGSS.HS-LS3-2

In snapdragons, Tallness (T) is dominant to dwarfness (t). In a cross between two plants that are homozygous for the recessive allele, the percent of offspring expected to exhibit tallness is

•  25%
•  75%
• 100%
• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The gene makeup of an organism for a particular trait is known as its

• dominance
• phenotype
• allele
• genotype

Tags

NGSS.HS-LS3-2

What percentage of the offspring will be purebred dominant?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-3