Genetics
Give an example of a heterozygous genotype.
Aa
True or False: Slight differences in inherited traits among individual members of a species are called “variations.”
True
Who benefits from artificial selection? Plants, animals, or humans? (Choose 1)
Humans
What type of genotype is this: TT?
Homozygous dominant
According to natural selection, organisms with variations that help them survive in their environment live ________, compete better, and reproduce more than those that do not have the variations.
longer
Which of the following scenarios accurately exemplifies artificial selection?
A. During a drought, finches with larger beaks survive longer than those with smaller beaks.
B. Corn is genetically engineered for disease resistance.
C. People with sickle cell anemia have a better chance of surviving malaria.
D. Deer mice that migrated to sandhills in Nebraska quickly changed from dark to light brown.
B
The allele for gray fur is dominant to black fur. What phenotype will a dog have if its genotype is Ff?
gray
Who developed the theory of evolution by natural selection?
Charles Darwin
Which type of artificial selection describes when two individuals with desired traits are chosen to create offspring with more of the desired trait?
Selective Breeding
The allele for longer necks (G) in giraffes is dominant to the allele for shorter necks (g). Create and solve a Punnett square to show a cross between two homozygous parents, one with a long neck and one with a short neck?
See your instructor for the answer
What do you call an adaptation that allows an individual to look like a different species?
Mimicry
Which type of artificial selection describes the replacement of missing or malfunctioning genes by addition of new genes to a patient’s cells?
Gene Therapy
The allele for black feet in a species of duck is dominant to the allele for brown feet. What are the probabilities for each phenotype (black and brown feet) if a heterozygous duck breeds with a brown-footed duck?
black feet = 50%
brown feet = 50%
A new predator is introduced to an ocean environment with a population of fish. Some fish are blue, and some fish are yellow. What will happen to the population of fish over time?
A larger proportion of the fish will be blue.
Which type of artificial selection describes the rearrangement of DNA to create a desired trait?
Genetic Engineering/Genetic Modification