Biology Quiz

What type of reproduction allows a female aphid to produce several identical female young per day by herself?

• Sexual reproduction

• Asexual reproduction

• Binary fission

• Budding

What is the result of blending of colors in flowers due to the presence of both dominant and recessive alleles?

• Complete dominance

• Incomplete dominance

• Co-dominance

• Polygenic inheritance

Which statement correctly describes the difference between mitosis and meiosis?

• Mitosis produces genetically different daughter cells, while meiosis produces genetically identical daughter cells.

• Mitosis produces genetically identical daughter cells, while meiosis produces genetically different daughter cells.

• Both mitosis and meiosis produce genetically identical daughter cells.

• Both mitosis and meiosis produce an equal number of genetically different daughter cells.

Which of the following sentences describes the ways plants spread their seeds? Choose the two that apply.

• Bees, attracted by brightly colored flowers, pick up and move seeds to new locations.

• Animals, attracted by scent, eat and then disperse seeds in new locations through their droppings.

• Seeds are carried away from the parent plant by wind or water.

• Flowers are picked and moved to new locations where their seeds can grow.

Grafting is when part of a plant's stem is cut and then attached to another plant. Apple farmers often use grafting to ensure that new plants will have the desired characteristics of the original apple tree. What kind of reproduction is this?

• stem sprouting

• fertilization

• sexual

• asexual

Dr. Michelle Wang at Cornell University studies DNA replication and protein synthesis. Her group researches how a protein called helicase unzips the DNA strand. After DNA is unzipped, what is the next step in DNA replication?

• Messenger RNA forms along the exposed DNA bases.

• A chromosome with two identical strands of DNA is formed.

• Nitrogen bases pair up with the DNA strands.

• Ribosomes attach to DNA and move along the strand.

Animal breeders are just as excited about genetic technologies as doctors. Many problems that were difficult before now have a solution insight. Which of the following problems could potentially be solved through DNA fingerprinting?

• test to confirm that a calf was fathered by a specific bull

• produce a bull with identical DNA to a champion

• produce a very small but healthy breed of cow

• remove a gene to develop cows with no horns

Humans have 23 pairs of chromosomes in every body cell. Even one extra chromosome causes death or serious disorders. For example, an extra copy of chromosome 21 causes Down syndrome. Which of the following are affected in a human being with an extra chromosome? Choose the three that apply.

• genetic instructions

• genotype

• acquired traits

• phenotype

How many chromosomes does every body cell have in a human with Down syndrome?

• A. 48

• B. 46

• C. 24

• D. 47

Which of the following traits did Gregor Mendel study in his experiments with pea plants?

• A. Stem length

• B. Seed texture

• C. Flower color

• D. Pod shape