Chapter 4 ~ Heredity Study Guide
Name ______________________
Section 1 (pages 100-105)
1. Gregor Mendel was born in the year _________ in _________________
2. Gregor Mendel did his research at a _________________
3. What is Heredity?
_______________________________________________________________________
4. Gregor Mendel used ________ plants for his experiments.
5. _________________________ have both male and female reproductive structures so they can pollinate
them selves.
6. When _________________________ plants self pollinate , all of the offspring will have the same traits
as the parent.
7. _________________________ When pollen from one plan fertilizes the ovule of a different plant
8. What is a genetic Characteristic
________________________________________________________
9. What is a genetic trait
___________________________________________________________________
10. Mendel used only ________________ pea plants for his study. Why did he do
this?____________________________________________________________________________
____11. Seen in the second generation
a. Dominant trait
____12. Offspring from the first cross
b. First-generation plants
____13. Seen in the first generation
c. Recessive trait
14.What happened in the second generation, when Mendel allowed the first-generation plants to selfpollinate? ___________________________________________
15.did the recessive trait appear as often as the dominant trait in the third generation? _____________
16.In the third generation the ratio of traits from dominant to recessive was about _____:_____
Section 2 (pages 106-111)
17.Genes are_________________________________________________________________________
18.Alleles (a-lee-alls) are _______________________________________________________________
19.Write an example of how genes and alleles relate to each other. ______________________________
_____________________________________________________________________________________
20.A Genotype is _____________________________________________________________________
21.How do we choose the letter for a genotype?_____________________________________________
22.in a genotype capitol letters represent ___________________________________________________
23.In a genotype lowercase letters represent ________________________________________________
24.How many alleles do you have per gene?________________________________________________
25.A genotype where both alleles are dominant is called ______________________________________
26.A genotype where both alleles are recessive is called ______________________________________
27.A genotype where one allele is dominant and one is recessive is called ________________________
28.A Phenotype is ____________________________________________________________________
29.What Genotypes will show a Dominant Phenotype________________________________________
30.What Genotype will show a Recessive Phenotype_________________________________________
31.Probability is ____________________________________________________________________
Questions
32. The genotype Pp can also be written? (p 107) a. pP b. pp c. PP d. Ppp
33. What kind of plant has two dominant genes OR two recessive genes? (p 107)
a. an organism b. a genotype c. homozygous d. heterozygous
34. What kind of plant has one dominant gene AND one recessive gene? (p 107)
a. an organism b. a genotype c. homozygous d. heterozygous
35. When purple(P) is dominant, the white(p) offspring of purple and white parents will be? ( p107)
a. pP
b. pp
c. PP
d. Ppp
36. What is a Punnett square used for? ( p107)
a.to show recessive traits
c.to show dominant traits
b.to show possible offspring
d.to show homozygous alleles
37. Look at the Punnett square on the left. List the genotypes that the offspring have?_________________
38. Look at the Punnett square on the right. List the genotypes that contain a dominant allele? __________
39. Look at the Punnett square on the right. Which two genotypes are exactly the same? ______________
40. If the purple flower color (P) is dominant over white (p), what color will most offspring be? ________
41. Look at the Punnett square on the right. What is the probability that the offspring will be pp?_______
42. What is the chance of a parent with one green allele and one blue allele giving a blue allele to an
offspring? A. 100% b. 25% c. 50% d. 75%
43. What can influence traits besides genes? a. height b. albinism c. phenotype d. environment
Parent X and Parent Y both have dimpled cheeks with a genotype of Dd.
Complete the Punnet Square below to find out what their offspring might look like.
44. What is the probability that the offspring of Parent X and Parent Y
_______will have each of the following genotypes?
DD:________
Dd:_________
dd:________
45. What is the probability that their offspring will have dimpled cheeks?
________
46. What is the probability that their offspring will have non dimpled
cheeks? _______
Parent A is homozygous dominant and Parent B is heterozygous for Purple color
Complete the Punnet Square below to find out what their offspring might look like.
47. What is the probability that the offspring of Parent X and Parent Y
_______will have each of the following genotypes?
PP:________
Pp:_________
pp:________
48. What is the probability that their offspring will have purple color?
________
49. What is the probability that their offspring will have non purple
color? _______