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REVIEW GENETICS- Lesson 4. 1. What is the name of the person who is called “The Father of Genetics”? 2. What did he study to find genetic links to help understand traits? 3. A segment of DNA that determines a specific trait in a person is called a _______.
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1. What is the name of the person who is called “The Father of Genetics”?2. What did he study to find genetic links to help understand traits?3. A segment of DNA that determines a specific trait in a person is called a _______
4. An allele is…A) a geneB) an alternative form of a geneC) a section of a traitD) none5. If I breed a white rabbit and a black rabbit and end up with some gray bunnies, what is this called?
8. What is this an example of? The pollen grains from a red flower was fertilized with a white flower (on the pistil). Pink flowers were produced.
9. Four generations on my father’s side all have dark hair. All of my cousins on my father’s side have dark hair. All of my four siblings and I have dark hair. What can I deduct?A) My father has only recessive genes for dark hair.B) My mother also must have dark hair.C) My father is most likely genetically pure bred for dark hair.D) My father and mother both are homozygous.
10. The ________________is/ are responsible for an acquired trait. • genes B) chromosomes C) environment D) chromatids.
#11-15. Tell which is homozygous and which is heterozygous. Tell if they will show the dominant or recessive trait. BB Dd Ff LL tt
16. If I can see the trait, this is called its ______ genotype dominant trait recessive trait phenotype
Tall is dominant and short is recessive for dog height. I see that I have a small dog. What can I deduct? I know my dog’s genotype and phenotype. I only know my dog’s genotype. I only know my dog’s phenotype. I don’t know my dog’s genotype or phenotype. It cannot be determined.
18. Give an example of a two homozygous and one heterozygous set of alleles using this information. Broad nose is dominant and narrow nose is recessive. Use “N” as the letter to identify the allele.
19. One parent has thick eyebrows and one parent has thin eyebrows. This couple has five children. All have thick eyebrows. Which trait is dominant and which is recessive? How do you know?
Handedness –Right /Left (use H) Eyelash length- Long /Short (use E) Lips –Broad/ Narrow (use L) Using the traits and alleles above, tell the phenotypes of the genotypes below. Tell what each person has. Patty- HH, ee, Ll Joe- Hh, Ee, Ll Mike- hh, ee, ll
Patty- HH, ee, Ll Joe- Hh, Ee, Ll Mike- hh, ee, ll Handedness –Right /Left (use H) Eyelash length- Long /Short (use E) Lips –Broad/ Narrow (use L) 21. Using the information above, answer these questions. Which person(s) is/are pure bred on all traits? Which person(s) is/are hybrid on all traits? Which person(s) could pass left handedness?
22. Jim and his wife Sarah both have freckles which they know is a dominant trait. Their first child does not have freckles. Will the next child probably have freckles? Yes; it is likely since there is a 50% chance and they already had one child without freckles. No; they will only pass the recessive Yes; they both have only dominant freckles and the one child without will probably get them later It cannot be determined since they now know they are hybrid and can pass either trait.
