1. Which of the following is true of mitosis? A) It results in 2 haploid daughte
ID: 85979 • Letter: 1
Question
1. Which of the following is true of mitosis?
A) It results in 2 haploid daughter cells;
B) It involves replication of DNA.
C) It results in 2 daughter cells that are genetically identical to, but smaller than, the parent cells.
D) Telophase takes the most time of any of the phases in mitosis.
E) All of the above.
2. A woman who has type O blood has a daughter who has type A blood and a son who has type B blood. The children’s father must have ____________________ blood.
A) AB
B) B
C) Could be A or B
D) Could be O or B
E) The children must have different fathers.
3. Nondisjunction is caused by errors in ____________________ whereas mutations are caused by errors in _____________________.
A) DNA replication, meiosis
B) DNA replication, mitosis
C) Meiosis, DNA replication
D) Mitosis, DNA replication
E) None of the above
4. Which of the following statements is true about sex-linked traits?
A) males cannot be homozygous for any gene on the X chromosome
B) X-linked recessive genes are always expressed in males
C) in general, males are affected by x-linked recessive disorders much more frequently than females
D) a male always gets his X chromosome from his mother
E) all of the statements are true
5. Joanne has Huntington disease, an autosomal dominant disease. What is the probability that one of her parents also has Huntington disease?
A) 25%
B) 50%
C) 75%
D) 100%
E) It is not possible to determine the probability with this information.
Explanation / Answer
1. c. Mitosis results in the formation of two daughter cells that are genetically identical to but smaller than the parent cells.
2. a. AB
If the mother has blood group O she can pass only an O allele to her son or daughter. BUT if the father has AB blood group, he can pass either allele A or B to his son or daughter.
3. c. meiosis, DNA replication
4. e. all of the statements are true.
5. b. 50%
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