Based on Mendel's experimental crosses, what is the expected F2 phenotype ratio of a single factor cross?
Responda
1:2:1
2:1
3:1
9:3:3:1
4:1
Questão 2
Questão
During which phase of nuclear division does Mendel's law of segregation physically occur?
Responda
Mitosis
Meiosis I
Meiosis II
All of the above
b and c only
Questão 3
Questão
An individual that has two different alleles of a particular gene is said to be
Responda
Dihybrid
Recessive
Homozygous
Heterozygous
Hemizygous
Questão 4
Questão
Which of Mendel's laws cannot be observed in a single-factor cross?
Responda
segregation
dominance/recessiveness
independent assortment
codominance
All of the above can be observed in a single-factor cross
Questão 5
Questão
During a ______________ cross, an individual with the dominant phenotype and unknown genotype is crossed with a _____________ individual to determine the unknown genotype.
Responda
single-factor, homozygous recessive
two-factor, heterozygous
test, homozygous dominant
single-factor, homozygous dominant
Test, homozygous recessive
Questão 6
Questão
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)
Responda
100%
75%
50%
25%
0%
Questão 7
Questão
A gene that affects more than one trait is said to be
Responda
Dominant
Wild-type
Dihybrid
Pleiotropic
Heterozygous
Questão 8
Questão
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
Responda
simple Mendelian
X-linked
codominance
incomplete dominance
pleiotropy
Questão 9
Questão
Genes located on a sex chromosomes are said to be
Responda
X-linked
Dominant
Hemizygous
Sex-linked
autosomal
Questão 10
Questão
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?
Responda
1
1/4
1/16
1/32
0
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