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Chapter 4 Mrs.Small
Terms in this set (24)
Gregor Mendel used pea plants to study heredity for all of the following reasons EXCEPT
1. That the characters Mendel studied had at least two identifiable traits.
2. That it was relatively easy to cross different pea plants in order to observe the resulting offspring
3. That many characters such a pod color and seed shape were controlled by a dozen or more interacting genes
4. that their characters, like pod color and height, were easy to observe
1. That many characters such as pod olor and seed shape were controlled by a dozen or more interacting genes
If you crossed the purebred green pod pea plants with purebred yellow pod pea plants, the offspring will all be?
hybrid peas with all green pods
The Austrian Monk who studied the principles of heredity in the early 1860s
A cross between purebred peas with pinched pea pods resulted in peas with all inflated pods. What is the recessiev trait.
Example of a phenotype
A punnet square determines
How likely an offspring is to have a certain genotype
Which notation could be used to represent the recessive allele for green pea pod seeds? Y y
An (Rr) Artic fox mates with another (Rr) fox. What genotype(s) would you except the pups to have?
Some (RR) some (Rr) and some (rr)
A cross of purebred parents with different traits may result in some offspring with the recessive trait.
(True or False)
According to Mendel's research, a dominant trait is hidden by the presence of a recessive trait. (True or False)
The study of how traits are passed from one generation to the next is called the science of heredity. (true or false)
An organisms phenotype determines its genotype. (True or False)
A plant that follows simple dominance and has the genotype (tt) would exhibit the dominant trait. (True or False)
Different forms of genes that result in different traits are known as alleles (True or False)
The way an organisms looks, or tha trait its genes express, is called its genotype. (True or False)
Example of multiple alleles
The gene that controls fur color in rabbits has four different alleles.
Human hair color, which is controlled by more than one gene, is an example of ____?
How many alleles affect the human blood type?
Pink snapdragons are an example of _____?
A black rooster is paired with a white hen. If feather color is an example of codominance, describe the offspring's feathers.
The offspring would have both black and white feathers
Skin color, height, and intelligence are controlled by a single gene. (True or False)
Human blood type does not follow Mendel's principles of heredity. (True or False)
Crossing a yellow-flowered plant with a red-flowered plant that follows incomplete dominance produces a plant whose flowers are both yellow and red. (True and False)
The random change in the ratio of alleles in a population over time is known as genetic drift. (True or False)
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