16: Incomplete and Co-Dominant Inheritance

A red flowered plant (RR) is crossed 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%

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

• Incomplete Dominance
• Co-Dominance

This is an example of ___________?

• Incomplete dominance
• Co-Dominance

This is an example of ___________.

•  Incomplete Dominance
•  Codominance

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

• Incomplete Dominance
• Co dominance

This is an example of ___________.

• Incomplete Dominance
• Codominance

In chickens, feather color is codominant.  If a black chicken BB is mated with one that is black and white (BW) what are the chances of having a chicken that is black and white?

• 50%
• 0%
• 25%
• 100%

In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb).  
Cross a black fowl with a white fowl. What is the phenotype ratio?

• 4 black: 0 grey: 0 white
• 2 black: 2 grey: 0 white
• 0 black: 4 grey: 0 white
• 0 black: 2 grey: 2 white

In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb).  
What is the genotype ratio for a cross between a grey fowl and a white fowl?

• 2 BB: 2 Bb: 0 bb
• 0 BB: 4 Bb: 0 bb
• 0 BB: 2 Bb: 2 b
• 1 BB: 2 Bb: 1 bb

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 2 speckled flowers and find the genotype ratio.

• 0 RR: 4 RW: 0 WW
• 2 RR: 2 RW: 0 WW
• 1 RR: 2 RW: 1 WW
• 0 RR: 2 RW: 2 WW