Based on Mendel's experimental crosses, what is the expected F2 phenotype ratio of a single factor cross?
Answer
1:2:1
2:1
3:1
9:3:3:1
4:1
Question 2
Question
During which phase of nuclear division does Mendel's law of segregation physically occur?
Answer
Mitosis
Meiosis I
Meiosis II
All of the above
b and c only
Question 3
Question
An individual that has two different alleles of a particular gene is said to be
Answer
Dihybrid
Recessive
Homozygous
Heterozygous
Hemizygous
Question 4
Question
Which of Mendel's laws cannot be observed in a single-factor cross?
Answer
segregation
dominance/recessiveness
independent assortment
codominance
All of the above can be observed in a single-factor cross
Question 5
Question
During a ______________ cross, an individual with the dominant phenotype and unknown genotype is crossed with a _____________ individual to determine the unknown genotype.
Answer
single-factor, homozygous recessive
two-factor, heterozygous
test, homozygous dominant
single-factor, homozygous dominant
Test, homozygous recessive
Question 6
Question
A woman is heterozygous for an X-linked disorder, hemophilia A. If she has a child with a man without hemophilia A, what is the probability that the child will be a male with hemophilia A? (Note: The child could be a male or a female)
Answer
100%
75%
50%
25%
0%
Question 7
Question
A gene that affects more than one trait is said to be
Answer
Dominant
Wild-type
Dihybrid
Pleiotropic
Heterozygous
Question 8
Question
A hypothetical flowering plant species produces blue, light blue, and white flowers. To determine the inheritance pattern, the following crosses were conducted with the results indicated:
blue x blue --> all blue
white x white --> all white
blue x white --> all light blue
Answer
simple Mendelian
X-linked
codominance
incomplete dominance
pleiotropy
Question 9
Question
Genes located on a sex chromosomes are said to be
Answer
X-linked
Dominant
Hemizygous
Sex-linked
autosomal
Question 10
Question
A man and a woman are both heterozygous for the recessive allele that causes cystic fibrosis. What is the probability that their first two offspring will have the disorder?