inheritance

What are small stretches of DNA that code for traits

• Nucleus

• Chromosomes

• Gene

• Centromeres

Tags

NGSS.HS-LS3-1

Complete the punnett square; what is the likelihood that an offspring is homozygous recessive?

• 1 in 4, or 25%

• 2 in 4, or 50%

• 1 in 2, or 50%

• 0 in 4, or o%

Answer explanation

Remember that the parent alleles represent sperm (male) and egg (female). We bring together one from each parent in each of the offspring squares to model mating.

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

A roan cow shows co-dominance in fur color (red and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?

• 4/4 Red and White

• 2/4 Red, 2/4 White

• 2/4 Red, 2/4 Roan, 0/4 White

• 1/4 Red, 2/4 Roan, 1/4 White

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

There are many different alleles for fur color in cats. What is this an example of?

• Codominance

• Incomplete Dominance

• Multiple Alleles

• Polygenic Traits

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A bubble guppy with a yellow tail has offspring with a bubble guppy with a red tail. The offspring have orange tails. What is this an example of?

• Codominance

• Incomplete Dominance

• Multiple Alleles

• Polygenic Triats

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

On this pedigree, the allele for curly hair is dominant. The couple labeled 2 both have curly hair, but have a daughter who does not have curly hair. Therefore, we can tell from the chart that for the couple labeled 2 -

• the male is heterozygous and the female is heterozygous.

• the male is homozygous recessive and the female is homozygous dominant.

Tags

NGSS.HS-LS3-1

A roan cow shows co-dominance in fur color (orange and white). What is the phenotype ratio expected if a roan cow and a roan bull mate together?

• 4: Orange and White
• 1: Orange : 1 White
• 2 Orange: 2 Orange and White: 0 White
• 1: Orange: 2 Orange and White: 1 White

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

One form of a gene is called_______________

• a DNA

• a phenotype

• a trait

• an allele

Tags

NGSS.HS-LS3-1

In a pedigree, which shape represents a male?

• circle

• square