BIOL 1030 Chapter 8

The function(s) of meiosis is/are _____.

Looking through a light microscope at a cell undergoing meiosis, you see that the chromosomes have joined into XX-shaped tetrads. These tetrads are lined up along a plane that runs through the center of the cell. This cell is in _____.

Meiosis starts with _____ cells and produces _____ gametes.

Meiosis is typically accomplished in _____.

The _____ separate in meiosis I; the _____ separate in meiosis II.

____ reproduction is a means of creating new individuals solely by _____, the form of cell division that creates genetically identical daughter cells.

During binary fission, one copy of the duplicating chromosome moves to the opposite end of the cell. What does this achieve?

A cell replicates its entire chromosomal DNA only _____.

Immune system cells enter a resting phase after undergoing mitosis. When activated - for example, by an infection - they can reenter the sequence of events in the cell cycle that leads to cell division. What would be the correct sequence of events?

Benign tumors differ from malignant tumors in that the cells of a benign tumor _____.

Asexual reproduction _____.

What must happen before a cell can begin mitosis?

The centrosomes move away from each other and the nuclear envelope breaks up during which phase of mitosis?

The chromosomes line up in the center of the cell during which phase of mitosis?

The sister chromatids separate and begin moving toward opposite poles of the cell during which phase of mitosis?

The chromosomes arrive at the poles and nuclear envelopes form during which phase of mitosis?

At the end of the mitotic (M) phase, the cytoplasm divides in a process called _________________.

Meiosis starts with a single diploid cell and produces

A cell preparing to undergo meiosis duplicates its chromosomes during

During prophase I of meiosis,

The correct order of events during meiosis is

During meiosis, segments of nonsister chromatids can trade places. This recombination of maternal and paternal genetic material is a key feature of meiosis. During what phase of meiosis does recombination occur?

A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. There are _____ chromatids.

A cell biologist carefully measured the quantity of DNA in grasshopper cells growing in cell culture. Cells examined during the G2 phase of the cell cycle contained 200 units of DNA. What would be the amount of DNA in one of the grasshopper daughter cells?

In some organisms such as certain fungi and algae, cells undergo mitosis repeatedly without subsequently undergoing cytokinesis. What would be the consequence of this?

Cytochalasin B is a chemical that disrupts microfilament formation. This chemical would interfere with _____.

An organism has a haploid chromosome number n = 4. How many tetrads will form during meiosis?

Two true-breeding plants are cross-fertilized. Their offspring are then cross-fertilized. What is the name given to this last offspring generation?

Many genetic disorders can be detected before birth. Procedures include _____, which is noninvasive, or _____, which allows the chromosomes of the fetus to be examined. Alternatively, maternal blood samples can be taken and tested for _____.

Linked genes are inherited together. This is because linked genes _____.

DdEe pea plants can produce _____ type(s) of gametes, but a ddee plant can produce _____ type(s) of gametes.

Three characteristics assort independently in one species of insect: Red eyes (R) are dominant to black eyes (r). Blue wings (B) are dominant to white wings (b). Green bodies (G) are dominant to yellow bodies (g). A cross is made between two heterozygous insects (RrBbGg). What is the probability that the offspring will be homozygous dominant for all three characteristics?

After crossing a true-breeding red-flowered snapdragon with a true-breeding white-flowered one, you note that all of your F1 population are pink. This is because _____.

Two parents of mixed ethnicity have twins, one of which is born white and one of which is born black. This is because of _____.

The frequency at which crossing over occurs between two linked genes depends on _____.

Gene Q is an X-linked dominant allele in crustaceans that controls eye color. A cross is performed between two crustaceans: a green-eyed male (X Q Y) and a green-eyed female (X Q X q ). What percentage of the offspring have green eyes?

A woman and her male partner have normal color vision. However, her father and her first son are colorblind. What is her genotype? Use C as the gene for colorblindness.