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Heredity Homework

Heredity 1

  1. Observe the F1 seedlings from the cross of gl1 x gfp1 using the dissecting scope and the royal blue light source. What is the inheritance pattern for the glabrous phenotype? What is the inheritance pattern for the gfp1 pattern?

Glabrous phenotypes are recessive, while gfp1 patterns are dominant

  1. Construct a Punnett square for the original cross of parental lines: gl1gl1/gfp2gfp2 x gl2gl2/gfp1gfp1

Gametes

gl1gl1/gfp2gfp2

gl2gl2/gfp1gfp1

gl2gl1/gfp1gfp2

  1. What is the expected phenotype?

Trichomes, fluorescent

  1. Construct a Punnett square for the F2. What are the possible gametes for this cross?

Gametes

gl2gfp1

gl2gfp2

gl1gfp1

gl1gfp2

gl2gfp1

gl2gfp1 gl2gfp1

gl2gfp2 gl2gfp1

gl2gfp1 gl1gfp1

gl2gfp2 gl1gfp1

gl2gfp2

gl2gfp1 gl2gfp2

gl2gfp2 gl2gfp2

gl2gfp1 gl2gfp2

gl2gfp2 gl1gfp2

gl1gfp1

gl1gfp1 gl2gpf1

gl1gfp2 gl2glfp1

gl1gfp1 gl1gfp1

gl1gfp2 gl1gfp1

gl1gfp2

gl1gfp1 gl2gfp2

gl1gfp2 gl2gfp2

gl1gfp1 gl1gfp2

gl1gfp2 gl1gfp2

Heredity 2

Table 1

Phenotype

Number of seedlings

 

# expected seedlings

 
 

Group

Class

Group

Class

Trichomes, Fluorescent

17

80

23

92

Glabrous, Fluorescent

7

36

8

30

Trichomes, Non-fluorescent

11

32

8

30

Glabrous, Non-fluorescent

6

16

3

10

Total

41

164

41

164

  1. Evaluate your observed vs. expected. Do they agree? If not, why might they not?

The observed and expected results are close, but not quite exact. This could be accounted for due to human error of difficulty identifying the characteristics of each phenotype. However, the results are very close.

  1. Were the results from your group substantially different from the total class data? Why?

The results from my group did not substantially differentiate from the class data. The percentages for each phenotypic group were very close if not exactly the same.

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