What I Know (Genes)

Which of the following theories does NOT explain the chromosomal basis of inheritance?

• A. Genes are located in the chromosomes.

• B. Chromosomes and their related genes undergo segregation during meiosis.

• C. Mendel’s laws of inheritance do not relate to the behavior of chromosomes in meiosis.

• D. Chromosomes and their related genes undergo independent assortment in the formation of gametes.

Which structure in a cell are chromosomes found?

• A. cell membrane

• B. mitochondria

• C. nucleus

• D. centromere

A child’s body cells each contain 46 chromosomes. How many chromosomes did the child inherit from his mother?

• A. 46 chromosomes

• B. 23 chromosomes

• C. 46 pairs

• D. 23 pairs

Which of the following laws violates the chromosomal theory of inheritance?

• A. Law of dominance

• B. Law of segregation

• C. Law of independent assortment

• D. None of these

Describe the centromere of a chromosome

• A. The part of the cell where the chromosome is located

• B. The longest arm of the chromosome

• C. The part of the DNA where the genes are found.

• D. The point in the chromosome that joins together the two chromatids.

Which of the following is considered the basic unit of heredity?

• A. Trait

• B. Chromosome

• C. Enzyme

• D. Gene

DNA can sometimes be found in tightly compacted structures called _______in the nucleus of a cell.

• A. Chromosomes

• B. Nucleotides

• C. Genes

• D. Nitrogenous bases

What is the complementary strand for A-C-G-T-T ?

• A. C-A-T-G-G

• B. T-G-C-A-A

• C. G-T-C-A-A

• D. T-G-A-C-C

The location of a particular gene on a chromosome is called the ______.

• A. "p" arm

• B. "q" arm

• C. genetic locus

• D. DNA

Which sentence is INCORRECT about genetics?

• A. Humans have 23 pairs of DNA (deoxyribonucleic acid).

• B. Alleles are different forms or versions of the same gene.

• C. A chromosome contains hundreds to thousands of genes.

• D. Each gene has a special role in determining physical traits.