Modern Genetics

A roan cow shows co-dominance in fur color (red and white). What are the possible offspring if a roan cow (female) and a roan steer (male) mate together? (Hint: draw a Punnett Square!)

• 4/4 roan offspring

• 2/4 red offspring, 2/4 white offspring

• 2/4 red offspring, 2/4 roan offspring

• 1/4 red offspring, 2/4 roan offspring, 1/4 white offspring

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers? (Hint: draw a Punnett Square!)

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-2

How much of your DNA do you inherit from your mom?

• 10%
• 25%
• 50%
• it varies

Tags

NGSS.HS-LS3-1

In which inheritance pattern are heterozygous individuals a blend of the dominant and recessive phenotypes?

• sex-linked inheritance
• complete dominance
• codominance
• incomplete dominance

I have 2 X chromosomes. What am I?

• Male

• Female

What type of inheritance do two alleles have if their traits blend together?

• Incomplete Dominance

• Codominance

• Mendelian Inheritance

• Homozygous Inheritance

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

• Incomplete Dominance

• Codominance

• Independent assortment

• Recessive inheritance

In some carnations, flower color exhibits codominance. When crosses, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.

Complete a cross between A speckled flower and a red flower. Find the phenotype ratio. (Hint: draw a Punnett Square!)

• 2 red: 2 speckled: 0 white

• 4 red: 0 speckled: 0 white

• 0 red: 4 speckled: 0 white

• 0 red: 2 speckled: 2 white

Tags

NGSS.HS-LS3-2

Which statement is NOT true regarding multiple alleles?

• An organism can have more than two alleles for a single gene

• An organism may inherit one of multiple possible alleles from one parent

• There exists multiple (>2) alleles for a given trait throughout the population

If a cow contains two codominant alleles--one for white hide color and one for red hide color--what would the cow's hide probably look like?

• white

• red

• orange

• patches of white and patches of red

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1