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WorksheetsScience 10 Genetics and Natural Selection Review
Total questions: 26
Worksheet time: 13mins
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
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
In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R X r ?
male with white eyes
female with red eyes
male with red eyes
female with white eyes
Look at this cross: XB XB x Xb Y
What proportion/percent of the male children are colorblind (b)?
100%
75%
25%
0%
H= normal blood clotting
h=hemophilia
XHXh x XHY
What is the probability that any of their offspring will have hemophilia?
4/4
3/4
2/4
1/4
The two cows on the top are the parents and the cow on the bottom is the offspring. What is the type of inheritance pattern is being exhibited?
Incomplete Dominance
Codominance
Multiple Alleles
Polygenic Inheritance
A population of rabbits grows rapidly from one year to the next. Then one year, a disease strikes approximately one fourth of the adult rabbits. The disease remains with the population in the years that follow.
As explained by Darwin’s theory, which of these conditions allows the rabbit population to evolve by natural selection?
The disease affects adult and juvenile rabbits equally.
The disease reduces the ability of the rabbits to reproduce.
Some rabbits are resistant to the disease, and they pass the resistance to their offspring.
No rabbits are resistant to the disease, and all die when the disease strikes them.
The graphs below show the changes in crab color at one beach.
Which of the following is most likely to have caused the change in the distribution?
A new predator arrived that preferred dark-tan crabs.
A new predator arrived that preferred light-tan crabs.
A change in beach color made medium-tan crabs the least visible to predators.
A change in beach color made medium-tan crabs the most visible to predators.
What is the most likely explanation of the data shown below?
There has been a drought in the area that is affecting all life forms.
The population of natural predators of the moths has gotten smaller.
The moths are living in an environment with light trees.
The moths are living in an environment with dark trees.
Which of the following is the correct definition of natural selection?
The idea that organisms less equipped for their environment tend to survive longer
The idea that organisms more well equipped for their environment tend to survive longer
The idea that organisms more well equipped for their environment tend to not survive
None.
Which of the following best describes what the image represents?
Natural Selection
Artificial Selection
Mutation
Genetic Drift
A group of organisms that can mate with each other and produce fertile offspring.
A group of organisms that can mate and produce offspring even if those offspring are infertile.
A group of organisms that genetically are very different from each other.
Indivual organisms that live in the same environment.
The term for the formation of new and distinct species over the course of evolution is...
speciation
biological species concept
reproductive barrier
natural selection
What is the mechanism of evolution?
Natural Selection
Adaptive Radiation
Mutation
Allele Frequency
A single species evolves into several distinct species
Derived Characteristics
Extinct
Macroevolution Patterns
Adaptive Radiation
According to most scientists, what is the biggest cause of most mass extinctions?
overhunting
evolution of new species to replace old ones
major change in environment/habitat
asteroid impact
