Honors: Genetics Review Part 1

This is an example of ___________?

• Incomplete dominance
• Co-Dominance

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

• Incomplete Dominance
• Co dominance

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How are Incomplete Dominance and Co Dominance different than a normal Mendelian cross?

• There is no difference
• The heterozygous genotype has a unique phenotype
• There is no heterozygous genotype
• There is only one phenotype regardless of genotype.

If you cross two checkered chickens (Bb x Bb), what would be the phenotypic ratio of the offspring?

• All Checkered
• 1 Black : 2 Checkered : 1 White
• 2 Black : 2 White
• 3 Black : 1 White

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Parents with Type B blood.......

• may have children only with blood type B

• may have children only with blood type O

• may have children with blood type O and B

• may have children only with blood type A

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Which blood types are considered as the rarest and the most common blood groups.

• the rarest AB- and the most common O+

• the rarest A+ and the most common B+

• the rarest B- and the most common AB-

• the rarest AB+ and the most common O-

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How can I test my blood group?

• By tasting

• By using antibodies

• By using antigens

• By mixing with the other blood groups

ABO blood grouping system is an example of

• incomplete domiance

• complete dominance

• codominance

• bad romance :)

A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:

• all black
• all white
• all gray
• speckled black and white

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A red flower (Rr) is crossed with a white flower (rr). What is the genotypic ratio?

• 0 RR; 0 Rr: 4 rr
• 2 RR; 0 Rr: 2 rr
• 4 RR; 0 Rr: 0 rr
• 0 RR; 2 Rr: 2 rr

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