AP Bio - Plickers 12/16-20/22

Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely...

A plant cell in the process of cytokinesis

Which of the following observations supported Mendel's hypothesis that inheritance is "particulate" rather than due to blending?

Crossing two purple-flowered heterozygotes produced purple-flowered and white-flowered plants

A cross between homozygous purple-flowered and homozygous white-flowered pea plants results in offspring with purple flowers. This demonstrates...

Dominance

Which of the following is true of a species that has a chromosome number of 2n=16?

Each cell has 8 homologous pairs

Mendel was able to draw his ideas of segregation and independent assortment because of the influence of which of the following?

His experiments with the breeding of plants such as peas

Methicillin-resistant Staphylococcus Aureus (MRSA) can be a serious threat to human health. There is evidence that Staphylococcus aureus infections are common in hospitals and that MRSA have become resistant to other antibiotics besides methicillin. This suggests that the rapid evolution of resistance in the bacteria poses a serious public health challenge. Which of the following best explains the ability of MRSA to evade existing drug therapy?

MRSA exchanges genetic material with other antibiotic resistant bacteria, which can spread resistance through Staphylococcus aureus populations

Which best describes the ABO blood group system?

Multiple alleles

Which of the following occurs in all species of living organisms and may lead to an increase in genetic variation?

Mutations in the genome

A researcher examining a root tip observes a plant cell with condensed sister chromatids, kinetochores with attaches microtubules, and individual chromosomes that are aligned at the equatorial plate of the cell. Which of the following best describes what the next process will be in the cell?

Paired chromatids will separate and the new daughter chromosomes will move toward opposite poles of the cells

Which term describes centrioles beginning to move apart in animal cells?

Prometaphase

Which of the following occurs in meiosis but not mitosis?

Synapsis of chromosomes

Individuals with an inherited autosomal recessive condition called PDC often have severe respiratory problems due to defective cilia. Males with PDC are often sterile because they produce sperm with defective flagella. Which of the follow most likely explains the effect of recessive alleles?

The cells do not produce functional motor proteins in the flagella and cilia

Imagine crossing a pea heterozygous at the loci for flower color (white versus purple) and seed color (yellow versus green) with a second pea homozygous for flower color (white) and seed color (yellow). What types of gametes will the first pea produce?

Two gamete types: P and p