Based on Mendel's experimental crosses, what is the expected F2 phenotype ratio of a single factor cross?
1:2:1
2:1
3:1
9:3:3:1
4:1
During which phase of nuclear division does Mendel's law of segregation physically occur?
Mitosis
Meiosis I
Meiosis II
All of the above
b and c only
An individual that has two different alleles of a particular gene is said to be
Dihybrid
Recessive
Homozygous
Heterozygous
Hemizygous
Which of Mendel's laws cannot be observed in a single-factor cross?
segregation
dominance/recessiveness
independent assortment
codominance
All of the above can be observed in a single-factor cross
During a ______________ cross, an individual with the dominant phenotype and unknown genotype is crossed with a _____________ individual to determine the unknown genotype.
single-factor, homozygous recessive
two-factor, heterozygous
test, homozygous dominant
single-factor, homozygous dominant
Test, homozygous recessive
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)
100%
75%
50%
25%
0%
A gene that affects more than one trait is said to be
Dominant
Wild-type
Pleiotropic
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
simple Mendelian
X-linked
incomplete dominance
pleiotropy
Genes located on a sex chromosomes are said to be
Sex-linked
autosomal
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?
1
1/4
1/16
1/32
0
