Nondisjunction during meiosis results in an abnormal number of chromosomes in one or more gametes. In some cases of nondisjunction, a single chromosome fails to separate. In others, none of the chromosomes separate. Suppose an egg is produced in which none of the chromosomes separate during meiosis II. What is the chromosome number of the zygote that results if this egg is fertilized by a normal sperm?
A. 1n
B. 2n
C. 2n + 1
D. 3n
Ans: D. 3n
Biology & Microbiology
You might also like to view...
Which of the following is not an adaptation of conifers to dry or cold conditions?
A. conical shape of tree B. scalelike or needle-shaped leaves C. flexible branches D. waxy cuticle E. production of resin
Biology & Microbiology
Do trees really sequester carbon permanently or just while they are alive? What will be an ideal response?
Biology & Microbiology
What is the structure labeled as A in the accompanying figure?
a. germinating spore b. gametangium of a plant c. gametangium of an alga d. megasporangium of an alga e. megasporangium of a plant
Biology & Microbiology
The stomach mixes food with secretions of the stomach wall to form
A) gastric juice. B) a bolus. C) gastrin. D) chyme.
Biology & Microbiology