/ Science Homework
Due: Friday, October 24th, 2014 / Name: ______
Teacher: ______Period: ____

TEST REVIEW:

DIRECTIONS: Use the word bank and your notes to complete each sentence below.

  1. ______is the mating of two organisms to produce offspring. This produces the most diversity in offspring.
  2. An ______is a form of a gene that you inherit from each parent. It can be recessive or dominant.
  3. When a person receives identical alleles from each parent (ex: EE or ee) the person is ______

for that trait.

  1. When a person receives a different allele from each parent (ex: Ee) the person is ______for that trait.
  2. ______is a word that is used to describe the different traits of a population.
  3. The exact alleles that are inherited by each parent are considered a person’s ______. Another way to say this would be that it is a person’s genetic code for a trait.
  4. A ______is the outward expression of a trait or characteristic. It is the appearance of the trait.
  5. A ______always masks (or covers up) the effect of the recessive allele. When writing a genotype it is usually written with a capital letter.
  6. ______are wound up strands of DNA that are located in the nucleus of each cell. Humans have 23 pairs.
  7. ______are a location on a chromosome that consisting of base pairs that code for specific traits.
  8. DNA (in the form of chromosomes) is located in the ______of each cell.
  9. ______is another word for baby or children.
  10. A ______is always masked (or covered up) by a dominant allele. In order for a recessive allele to show up, both alleles inherited from the parent must be recessive.
  11. ______is a form of reproduction only requiring one organism. The organism makes an exact copy (replica) of itself.
  12. The genetic material that chromosomes are made from is called ______. It contains four base pairs that code for the traits of an organism.

Directions: Use your notebook and what you learned from our Genetics unit to fill in the boxes below.

Directions: Look at the human traits below in the chart. Draw a Punnett Square to answer the questions about Michael and Tonya’s offspring (children).

  1. Michael and Tonya are both HETEROZYGOUS for earlobes (Ff). What are the possible genotypes of their offspring? What are the possible phenotypes?
  1. Michael is HOMOZYGOUS DOMINANT for the shape of his finger and Tonya is HOMOZYGOUS RECESSIVE for a bent finger. What are the possible genotypes and phenotypes their offspring can have?

SEXUAL and ASEXUAL reproduction:

  1. If Tonya reproduced asexually what would be the outcome if she had offspring? What would they look like?
  1. Does sexual or asexual reproduction produce MORE diversity in offspring? EXPLAIN.