Terminology
The expression of a physical trait
Phenotype
Do all characters follow Mendel's principles of heredity?
No, some do not
If two traits produce a blended phenotype they are exhibiting _____ dominance
Incomplete
_____ is the random changing of alleles over time, whereas _____ is the passing on of traits which aid in survival
Genetic drift; Natural selection
Mendel used _____ to study heredity
Pea Plants
A _____ trait is hidden by the presence of a _____ trait
Recessive; Dominant
What does the output of a Punnett square tell you about the offspring?
The probability for genotype and phenotype
If the pod color of a pea is controlled by one gene containing only two possible alleles that will produce one of two phenotypes it is displaying _____ dominance
Simple
Creationists and evolutionists believe in the effects of natural selection changing the traits of a population, but where do they disagree about it?
Evolutionists believe that natural selection is able to allow creatures to descend from a common ancestor
Why did Mendel use Pea Plants to study heredity?
Acceptable Answers:
characters had at least two traits
traits easy to observe
easy to cross different pea plants
The process by which organisms with certain adaptations survive to pass on their traits to a greater number of offspring is known as _____
Natural Selection
Crossing red camellia flowers with white camellia flowers, which are known to exhibit codominance, will produce what color offspring?
Red and white
If both parental traits are present in the offspring, but without blending, it is displaying _____ dominance
Co(dominance)
Has natural selection been observed to create new kinds of organisms?
No
Alleles for the dominant trait are represented with _____ letters
Uppercase
The random change in the ratio of alleles in a population over time is called _____
Genetic drift
Crossing red and white snapdragons, which are known to display incomplete dominance, will produce what color flowers?
Pink
What is the difference between incomplete and codominance?
Blending of traits
If a gene has more than two possible alleles it is dealing with _____ alleles.
Multiple
What determines the phenotype?
Genotype
The study of how traits are passed from one generation from the next is known as _____
Heredity
Human height, skin color, and hair color are determined when multiple genes interact, this is known as _____
Polygenic inheritance
Which dominance deals with hidden traits?
Simple dominance
If two purebred pea plants of the same genotype and phenotypes cross, what will the resulting offspring be?
Purebred
Why would a scientist need to know the genotype of an offspring, and not just the phenotype?
So they can track dominant and recessive traits and predict the percentage of inherited traits in generations to come