GENETICS WORKSHEET The letters used to represent what genes by lauraarden

VIEWS: 193 PAGES: 2

									GENETICS WORKSHEET #2

 1. The letters used to represent what genes a person has is called their
    (phenotype or genotype).

 2. The description of what someone LOOKS like is called their (phenotype
    or genotype).

 3. Genotype example: __________

 4. Phenotype example: __________

 5. A gene in a pair that always shows up and prevents the expression of the
    other gene is called: dominant or recessive?

 6. A gene in a pair that is always covered up by the other gene is called:
    dominant or recessive?

 7. Is the dominant gene or the recessive gene always represented by a
    capital letter? ________________________

 8. Which is represented by a lower case letter? ____________

 9. Homo mean?

   Hetero means?

 10.Give an example of a homozygous genotype: ________

 11. Give an example of a heterozygous genotype: _________
  12.The following letters represent pairs of genes. Indicate whether each
  pair is : heterozygous or homozygous dominant or homozygous recessive.

     DD ____________________                Rr __________________

     Dd ____________________                bb __________________

     dd ____________________                BB __________________

     Mm ___________________

  13. Use letters to represent the genotypes for the following:

     Homozygous recessive _________

     Homozygous dominant _________

     Heterozygous              _________



14. Using the following KEY:     R = tongue roller
                                 r = non-roller

     A. What is the phenotype of someone with these genes:

        RR = _______________________

        Rr = _______________________

        Rr = _______________________

								
To top