12. Meiosis

Alternate forms of the same gene are called:

A cell that has 2 copies of each chromosome is called a __________ cell:

All human cells, except sex cells, are diploid and have 23 pairs of chromosomes. Human sex cells, such as egg and sperm, are haploid and have _______ chromosomes.

Which of the following statements correctly describe the relationship between genes and chromosomes? a. Genes are chromosomes; b. Chromosomes contain many genes; c. Genes are made up of hundreds or thousands of chromosomes; d. Genes are assorted independently during meiosis, but chromosomes are not; e. More than one of the above is correct.

How many genes are there in a human sperm cell? a. 23 b. 46 c. about 21,000 d. about 3 billion

Plant species A has a diploid chromosome number of 12. Plant species B has a diploid number of 16. A new species, C, arises as an allopolyploid from A and B. The diploid number for species C would probably be a. 14. b. 16. c. 28. d. 56.

If one species (2n=10) crosses with another species (2n=18), producing an allopolyploid offspring, what is the ploidy of the offspring? a. 2n=10 b. 2n=18 c. 2n=10 + 18=28 d. 4n=36 +20=56