Genetics Practice

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

• Incomplete dominance

• Codominance

• Complete dominance

• Mendelian inheritance

This type of inheritance pattern is a MIXTURE of both traits, like the old theory of blending

• incomplete dominance

• co-dominance

• complete dominance

• recessive pattern

Match the following combinations of alleles:

• dd

• Homozygous recessive

• Dd

• Heterozygous

• DD

• Homozygous dominant

The genotypic percentage resulting from this this cross would be _____________________.

• 25% blue eye 75 % brown eye 
• BB = 25% Bb = 50% bb = 25%
• BB= 50 % bb = 50%
• All brown eye

What term describes what you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

Two heterozygous parents produce offspring. What is the probability of the HOMOZYGOUS DOMINANT GENOTYPE appearing in the offspring generation?

• 75%
• 25%
• 50%
• 100%

Jim has type AB blood. His dad could be type O.

• True

• False

Blood type is determined by the antigens present on the surface of RBCs.

• True

• False

If one of your parents is blood type A and the other is type B, which of the following blood types could you be?

• O

• AB

• A or B

• Any of these

Genotype refers to the ...

• physical expression of the genes
• the possible combination of alleles in a gene
• whether an allele is dominant or recessive
• how an organism will appear