Genetics Unit Review
____________________1. The study of how traits are passed from one generation to another is called__.
____________________2. The inventor of the Punnett square was ______.
____________________3. The father of genetics is ______.
____________________4. The 2 ‘choices’ for a trait are represented by letters and are called __..
____________________5. When a pair of alleles are identical, we say the individual is ___ for that trait.
____________________6. When the 2 alleles are different for a trait we say the individual is __ for this
____________________7. The type of inheritance involved when there is 1 trait dominant is called __.
____________________8. We use the letter of the ___ trait to represent the traits.
____________________9. The recessive trait is represented by a ____ letter of the same letter as the
____________________10. How many alleles can be passed on for a single trait by one parent?
____________________11. How many alleles does a parent have for a trait?
____________________12. A monohybrid cross deals with how many traits?
____________________13. A dihybrid cross deals with how many traits?
____________________14. How many squares are in a dihybrid cross square?
____________________15. The ratio of physical appearances on a cross or Punnett square are called the __.
____________________16. The ratio of the actual types of genes , or letters, is called the _____.
____________________17. Genotype refers to the ______________________________________.
____________________18. Phenotype refers to the _____________________________________
Show the x format and the Punnett square for the following crosses. Also show the genotypic and phenotypic
ratio and any work involved with getting your answer.
19. Tall is dominant to short, in pea plants. Show the x format and Punnett square for a cross of 2 heterozygous pea plants.
20. In cats, short hair is dominant to long hair. Show a cross of a homozygous short hair cat crossing with a heterozygous cat.
21. In pea plants, round peas are dominant to wrinkled peas. Show a cross of a homozygous round pea plant with a wrinkled pea plant.
22. In pea plants, round peas are dominant to wrinkled peas. Purple flowers are dominant to white.
Show a dihybrid cross of 2 double heterozygous plants for these traits.