Genetics & Heredity

Different forms of genes are called

• traits

• B. monohybrid crosses

• C. alleles

• D. gametes

The physical appearance of an organism is called its

• A. assortment

• B. recessive

• C. genotype

• D. phenotype

If one form of a gene can overpower or mask another form, it is

• A. recessive

• B. dominant

• C. homozygous

• D. heterozygous

Human somatic cells contain ____ chromosomes, while sex cells contain ______ total chromosomes.

• 23, 46

• 25, 50

• 46, 23

• 50, 25

If the cabbage’s diploid number is 18, then what is the haploid number?

• 4

• 9

• 18

• 23

Mitosis and meiosis are both forms of cell division. The result of    

         mitosis and meiosis are very different. Meiosis results in _____,

         While mitosis results in _____. 

• 4 diploid cells; 2 haploid cells

• 4 haploid cells; 2 diploid cells

• 2 haploid cells; 1 diploid cell

• 2 diploid cells, 1 haploid cell 

Which of the following statements is not true about meiosis?

• Two divisions occur

• Haploid cells are produced

• Daughter cells are identical to parent cell

• Occurs only during certain times in an organism's lifetime

Which would most likely produce a mutation that is passed onto 

     offspring?

• Radiation changing the DNA sequence in skin cells

• A gamete with an extra chromosome forming

• Tobacco smoke altering the genes in lung cells

• Exposure to chemicals altering nerve cell functions

Which of the following events occurs during anaphase II of meiosis II?

• Sister chromatids separate

   

• Nuclear membrane breaks down

• Cytoplasm divides

• Spindle fibers disassemble

At the end of meiosis II in females, egg cells have been produced that

     have:

• One X chromosome.

• Two X chromosomes.

• One X or Y chromosome.

• One X and one Y chromosome.