Non-Mendellian Genetics And Dihybrid Cross Practice Question Preview (ID: 50469)


This Game Will Make Sure You Have The Skills To Answer Questions About Incomplete Dominance, Codominance, Multiple Alleles, And Dihybrid Crosses. Remember, Only Dihybrid Crosses Will Involve Two Different Traits In The Same Question. TEACHERS: click here for quick copy question ID numbers.

If several roses with the genotype rrTt are crossed with roses with the genotype RRtt, what percentage of the offspring will be dominant for both traits?
a) 100%
b) 75%
c) 50%
d) 25%

What percentage of the offspring from a AaBb x aabb cross would be expected to be homozygous recessive for both traits?
a) 0%
b) 50%
c) 25%
d) 75%

Mice can have black fur (B) or white fur (b). They can also have long tails (L) or short tails (l). What percentage of the offspring from a BbLl x bbss cross would be heterozygous for both traits?
a) 100% will be BfLl
b) 75% will be BfLl
c) 50% will be BfLl
d) 25% will be BfLl

Corn can be purple (P) or yellow (p). They can produce wrinkled (W) or smooth (w) kernels. If corn with the genotype PPWw are crossed with corn that is ppWW, what percentage of the offspring will be expected to have the PPWw allele combination?
a) 100%
b) 50%
c) 25%
d) 0%

In cacti, plants can have long spines (LL), short spines (SS) or both long and short (LS). If a long spined cactus is crossed with a short spined cactus, what are the predicted phenotypes of the offspring?
a) 25% long, 25% short and 50% long and short mixed
b) 50% long and 50% short
c) 100% long and short mixed
d) 50% long and 50% long and short mixed

In peas, tall (T) and round (R) are dominant to short (t) and wrinkled (r). A gardener crosses a tall round pea plant (TTRr) with a short wrinkle pea plant (ttrr). Which statement describes the potential offspring?
a) all of the plants will be tall and half will have wrinkled peas
b) All the plants will produce round peas and half will be short
c) all of the plants will be tall and produce round peas
d) all of the plants will be tall and produce wrinkled peas

Humans can have type A, B, AB, or O blood. A and B are codominant to each other and dominant to O. If a woman with type A blood and a man with type B blood have a baby with type O blood, was the woman necessarily unfaithful (cheated)?
a) yes- all of their babies should have had type AB blood
b) yes- all of their babies should have had type A blood or type B blood
c) no- both parents could be heterozygous for their blood types
d) no- the parents could be homozygous for their blood types

Humans can have type A, B, AB, or O blood. A and B are codominant to each other and dominant to O. If a woman with type AB blood and a man with type O blood have a baby, what is the chance the baby will have type O blood?
a) 100%
b) 50%
c) 25%
d) 0%

In ladybugs, the allele for red color (R) is incompletely dominant to the allele for yellow color (r). Individuals with the genotype Rr are orange. What is the predicted phenotypic ratio if two orange ladybugs mate?
a) 25% red, 50% orange, 25% yellow
b) 50% red, 0% orange, 50% yellow
c) 0% red, 100% orange, 0% yellow
d) 50 % red, 50% orange, 0% yellow

Red (R) is dominant to black (r), and small (S) is dominant to large (s). If two RrSs organisms are crossed, what will the predicted outcome be?
a) 9 red and small : 3 red and large : 3 black and small : 1 black and large
b) 4 red and small : 4 red and large : 4 black and small : 4 black and large
c) 16 red and small : 0 red and large : 0 black and small : 0 black and large
d) 6 red and small : 6 red and large : 4 black and small : 0 black and large

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