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100
What does the notation TT mean to geneticists?
2wo dominant alleles
100
What is the probability of producing a tall pea plant from a genetic cross between two hybrid tall pea plants?
75%
100
What does a Punnett square show?
All the possible outcomes of a genetic cross
100
A purebred chicken with white feathers is crossed with a purebred chicken that has black feathers. Each of their offspring has both black and white feathers. Why does this happen?
The alleles for feather color are neither dominant nor recessive.
100
Which term refers to physical characteristics that are studied in genetics?
Traits
200
An organism’s genotype is its
Genetic make up
200
Which trait is controlled by a dominant allele? How do you know?
Active, because it's represented by a capital letter
200
Which trait is controlled by a recessive allele? How do you know?
Inactive because it's represented by a lower case letter.
200
In which generation are the parents purebred?
F1
200
In which generation are the parents hybrid?
F2
300
What is the probability that the offspring will be active?
75%
300
What is the probability that the offspring will be inactive?
25%
300
A(n) ____________________ organism is the offspring of many generations of organisms that have the same trait.
purebred
300
If a(n) ____________________ allele is present, its trait will appear in the organism.
dominant
300
Alleles that are neither dominant nor recessive produce an inheritance pattern known as ____________________.
Codominance
400
In pea plants, green pod color is controlled by a dominant allele. Yellow is controlled by a recessive allele. Explain why a plant with yellow pods can never be a hybrid.
Because in order for the yellow phenotype to display, there has to be 2 recessive alleles (homozygous/ purebred)
400
Determine the parent genotypes
BB, bb
400
Determine the parent genotypes
BB, Bb
400
A- active, a- inactive
If a heterozygous male is crossed with a homozygous recessive female, what is the probability that the offspring will be homozygous dominant?
0%
400
B- brown eyes, b- blue eyes
If 2 heterozygous parents are crossed, what is the probability that the offspring will have blue eyes?
25%