Chapter 10 Self Quiz: Foundations of Genetics

Interactive tutorials with "MendAliens":
- Punnett square
- Incomplete Dominance
If the two alleles of a gene differ, the organism is ________, and the ________ allele determines the organism's ________.
1. heterozygous, dominant, genotype (wrong)
2. homozygous, dominant, phenotype (wrong)
3. homozygous, recessive, phenotype (wrong)
4. homozygous, dominant, phenotype (wrong)
5. heterozygous, dominant, phenotype (correct)
  Hint
The offspring between a homozygous dominant and a homozygous recessive individual are
1. 100% homozygous dominant (wrong)
2. 100% homozygous recessive (wrong)
3. 100% heterozygous (correct)
4. 3 : 1 ratio of dominant : recessive (wrong)
5. 2 : 1 ratio of dominant : recessive (wrong)
  Hint
If two heterozygotes of a trait exhibiting complete dominance mate, the expected offspring phenotype ratio is
1. 1 : 2 : 1 (wrong)
2. 1 : 1 (wrong)
3. 3 : 1 (correct)
4. 1 (wrong)
5. 0 (wrong)
  Hint
In snapdragons, pink-flowered plants are produced when red-flowered plants are crossed with white-flowered plants. This is an example of
1. simple dominant and recessive traits (wrong)
2. codominance (wrong)
3. incomplete dominance (correct)
4. aneuploidy (wrong)
5. recessive dominance (wrong)
  Hint
In the ABO blood group, an individual with I^Ai genotype has type ________ blood.
1. A (correct)
2. B (wrong)
3. AB (wrong)
4. O (wrong)
5. A or O (wrong)
  Hint
Nondisjunction can occur in
1. meiosis I or meiosis II (correct)
2. meiosis I only (wrong)
3. meiosis II only (wrong)
4. mitosis only (wrong)
5. cytokinesis only (wrong)
  Hint
Which is the result of nondisjunction of the X chromosome?
1. Down syndrome (wrong)
2. XX males (wrong)
3. Turner syndrome (correct)
4. AB blood type (wrong)
5. O blood type (wrong)
  Hint
Most genetic disorders are caused by recessive alleles where heterozygous individuals are called
1. dominants (wrong)
2. dihybrids (wrong)
3. purebreds (wrong)
4. carriers (correct)
5. mixers (wrong)
  Hint