Bio Q3 Benchmark Review

In humans, the haploid number of chromosomes is ____.

• 23

• 46

• 69

• 92

Which of the following is the best definition for MEIOSIS?

• the process of two haploid cells uniting

• the counting of chromosomes within a diploid cell

• a two-step process that reduces the number of chromosomes in half such that there is only one copy of all the chromosomes

• the equational division of a cell into two identical copies

In which stage of MEIOSIS does crossing over occur? (The exchange of genetic material between chromosomes in a tetrad.)

• Anaphase I

• Metaphase I

• Prophase I

• Telophase I

How many cells are formed at the end of Meiosis II?

• 2

• 3

• 4

• 8

The products of MEIOSIS have _______ number of chromosomes.

• haploid

• diploid

How does meiosis contribute to genetic variation?

• It produces sex cells with increased genetic variation

• It produces sex cells with decreased genetic variation

• It produces somatic cells with increased genetic variation

• It produces somatic cells with decreased genetic variation

Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

Which bases are only found in DNA?

• Thymine

• Cytosine

• Adenine

• Uracil

• Guanine

What are the nucleotides made of?

• Sugar, Phosphate, nitrogen base
• Phosphate, Adenine, nitrogen base
• Thymine, Adenine, Cytomine
• Phosphate, Nitrogen, Adenine