Unit Test Review: Genetics

Johnny has blue eyes, like his grandmother on his mother’s side.  His mother and father both have brown eyes, which are dominant.  Which statement best explains why Johnny has blue eyes?

• He received a dominant gene from each parent
• He received a recessive gene from his mother and a dominant gene from his father
• He received a dominant gene from his mother and a recessive gene from his father
• He received a recessive gene from each parent

Which of the following best describes heredity?

• A male fish that mates with a female fish
• A coyote teaching her pup to hunt prey
• A mother who passes her freckles on to the next generation
• A plant making its own food through the process of photosynthesis.

What is one advantage of sexual reproduction?

• It produces offspring that are identical to the parents.
• It decreases the diversity of a population.
• It allows populations to adapt to new conditions over generations.
• It makes it impossible for harmful traits to be passed on to future generations.

What is one disadvantage of asexual reproduction?

• A new population can quickly be established by one individual
• Identical genes = less able to survive environmental changes
• Greater diversity
• They are unable to reproduce quickly

True or false: Genes control inherited traits.

• True
• False

True or false: Sexual reproduction requires the joining of sex cells donated from each parent.

• True
• False

Nuclei are important for organisms because they hold which of these?

• Genetic material
• Cytoplasm
• Energy for the cell
• Waste

If an amoeba reproduces through asexual reproduction, will its offspring be genetically identical to the parent?

• Yes
• No

If you cross a homozygous dominant flower (PP) with a homozygous recessive flower (pp), what percentage of the offspring will also be homozygous?

• 100%
• 0%
• 50%
• 25%

Which of the following is true about sea anemone, who reproduce asexually by splitting?

• The offspring have half as much DNA as the parent anemone.
• The offspring are genetically identical to the parent anemone.
• The offspring will contain genes from two parents.
• The offspring has more genetic material than the parent.