In a heterozygous individual, the ________ allele determines the phenotype.
dominant
100
A daughter inherits:
A. more genes from her mother
B. more genes from her father
C. one copy of each gene from her mother and one copy from her father
C. one copy from each
200
An individual who has two different alleles for a gene is _______.
heterozygous
200
An individual who has two identical alleles for a gene is ___________.
homozygous
200
If the somatic cells of a chimpanzee have 48 chromosomes, how many chromosomes are their gametes?
24
200
If a heterozygous individual has a phenotype that is intermediate between both types of homozygous individuals, what does this mean?
The trait is inherited through Incomplete Dominance
200
A man who is heterozygous for the recessive albino allele is married to a woman who is homozygous for normal skin color (Aa x AA). What fraction of their children would you expect to be albino?
0%
300
If an allele does not affect the phenotype of a heterozygous individual, the allele is ___________.
recessive
300
What does it mean if an allele is dominant?
the phenotype always shows that allele, masking the recessive allele
300
What problem would result if sperm and eggs were produced by mitosis instead of meiosis?
they would have too many chromosomes
300
Blood types are an example of what type of inheritance?
Multiple Alleles (or Co-dominance)
300
If a son has an X-linked condition (e.g. color blindness or hemophilia), he must have inherited the gene for this condition from his _______.
mother
400
A striped fruit fly is crossed with a non-striped fly.
N = non-striped
n = striped
What is the genotype of the striped parent?
nn
400
The ‘B’ gene controls the color of a dog’s coat. The ‘R’ gene controls the texture.
Which alleles, B, b, R, and/or r, would occur in all the offspring of the following parents?
BbRR x bbRr
b and R
400
State two differences between meiosis and mitosis.
(see your mitosis-meiosis chart)
400
A child has a genetic disease caused by a single gene. Neither parent has the disease. The allele that causes the genetic disease must be ________.
recessive
400
A mother has type O blood and her husband has type AB blood. What blood types can their children have?
A or B
500
A striped fruit fly is crossed with a non-striped fly. All 100 offspring are non-striped.
N = non-striped
n = striped
What is the genotype of the non-striped parent?
NN
500
The ‘B’ gene controls the color of a dog’s coat. The ‘R’ gene controls the texture.
B = black, b = white
R = rough, r = smooth
Which trait would occur in all the offspring of the following parents?
bbRR x BbRr
Rough coat
500
The law of independent assortment describes the inheritance of genes on different chromosomes and the behavior of chromosomes at the beginning of--
A. meiosis I
B. meiosis 2
C. mitosis
D. A and B
E. all of the above
A. meiosis I
500
An allele of a single gene causes a disease that affects many more males than females. What does this mean about the way this gene is inherited?
it is X-linked
500
Parents who are both heterozygous for the alleles for albinism (Aa x Aa) have 2 heterozygous children. Now, the mother is expecting fraternal twins. The most likely genotypes for these twins are ___ and ___.