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WorksheetsNonmendelian Genetics
Total questions: 10
Worksheet time: 17mins
Codominant and incompletely dominant traits have three phenotypes instead of two. How many alleles (versions of the gene) are involved?
1
2
3
4
In snapdragons, flower color is an incompletely dominant trait. Which genotype will lead to a third blended phenotype?
Homozygous dominant
Heterozygous
Homozygous recessive
Red is incompletely dominant to white in snapdragons. Which cross would result in 100% pink flowers?
RR x rr
rr x rr
Rr x Rr
RR x RR
In humans, curly hair is dominant to straight hair, and wavy hair is an intermediate texture. Which explanation most likely accounts for wavy hair?
a mutation occurred, producing wavy hair
a different set of genes resulted in wavy hair
inheritance occurred through incomplete dominance
inheritance occurred as a result of a gene from only one parent
In chickens, black is co dominant with white feathers. Which cross would result in 50% black and white feathers?
BW x BW
BB x WW
BW x WW
WW x BB
In a certain breed of cattle, both red and white hairs show up together. This is an example of which type of inheritance pattern?
incomplete dominance
codominance
multiple alleles
polygenic inheritance
What is name for traits that are controlled by many genes such as height and skin color?
complete dominance
incomplete dominance
co dominance
polygenic
multiple alleles
What are the genotypes for type A blood?
IAIA
IAIB
IAi
IBIB
ii
A child has blood type AB. Which blood types would his parents most likely have?
B and O
O and A
A and B
AB and O
Which could NOT result from a cross between IAIB and IAi?
Type A Blood
Type B Blood
Type AB Blood
Type O Blood
