DNA Replication and Mitosis Test

What happens during the G2 stage of interphase?

Synthesis of proteins

How many autosomes are there in a human sperm?

22

A cell in the testis of a male chimpanzee contains 48 chromosomes. It is about to undergo meiosis. How many molecules of DNA will be present in the nucleus of the sperm cells just after meiosis?

24

If the amount of DNA in a haploid gamete is represented by x, what is the net quantity of DNA in a cell from the same organism at the start of meiosis?

2x

What is a difference between a cell in the G1 phase and a cell in the G2 phase of the cell cycle?

A cell in the g2 phase would have more mitochondria than a cell in the G1 phase.

Which of the following does not occur during interphase?

Cytokinesis

When do chiamata form in meiosis?

During prophase I

Which of the following statements about homologous chromosomes is correct?

Each gene is at the same locus on both chromosomes

What happens in crossing over?

Exchange of genetic material between homologous chromosomes

What is the sequence of stages during the cell cycle?

G1 -> S -> G2 -> mitosis -> cytokinesis

Which events occur during the G1 phase and S phase of the cell cycle?

G1 Phase: Cell grows S Phase: DNA replicates

What do all human males inherit from their mother? I. An X chromosome II. A Y chromosome III. Mitochondrial DNA

I and III only

Which of the following takes place during either interphase or mitosis in animal cells? I. Re-formation of nuclear membranes II.Pairing of of homologous chromosomes III. DNA replication

I and III only

Which hot the following type of information are needed to construct a karyotype? I. Size of the chromosomes II. Gene mutations of the chromosomes III. Age of the individual

I only

Which processes result in recombination?

Meiosis: Yes Crossing Over: Yes Independent Assortment: Yes Mutation: No

What does therapeutic cloning involve?

Producing embryonic stem cells for medical use

What is chorionic villus sampling (amniocentesis)?

Sampling fetal cells from the amniotic fluid

How can cells in a multicellular organism differentiate?

They express some of the their genes but not others

The DNA of a particular cell is damaged, so that the cell continues to divide uncontrollably. What is the possible result?

Tumor formation

Which of these processes require mitosis?

Embryological development