Genetics IB

What type of inheritance is determined by multiple genes and there can be a range of traits?

• Codominance

• Incomplete dominance

• Polygenic traits

Males are more likely to inherit X-linked recessive conditions than females due to:

• Having a smaller Y chromosome

• More genes being passed on by their mother

• Only having one X Chromosome which means if they have the gene it will be expressed

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

color blindness is an X-linked recessive trait. A color-blind woman and a color-blind man have a son. What is the probability that the son is also color-blind?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

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?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?

• Red

• Red and White

• White

• Pink

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In butterfly bushes, dark purple and pink parents will produce offspring with lavender flowers. This is a result of 

• codominance

• incomplete dominance

• complete dominance

• recessive dominance

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A gene that is controlled by more than two alleles

• MULTIPLE ALLELES

• PLEIOTROPY

Blood type is determined by _______ alleles

• One

• Two

• Multiple

Black and white checkered chickens is an example of ______.

• Codominance

• Incomplete dominance.

• Polygenic characteristics

Controlled by more than one gene.

• Codominance

• Incomplete dominance.

• Polygenic characteristics