Computerprac,cum Kwan,ta,eve gene,ca
1. Assessing the variation in spot number
In the space below, sketch—don’t copy in detail—the histogram showing the distribu,on of spot
number in your star,ng Le@ Field popula,on. Record the average number of spots: 7_____
2. Estimating the heritability of spot count
Record your data on parents and offspring for the ma,ngs you set up in the table below. When you
feel you have an accurate es,mate of the heritability of spot count, sketch—don’t reproduce in
detail—your scaIerplot in the space at right. Record your es,mate for the heritability of spot count:
Family # Spots #Spots Midparent # Spots # Spots Midoffspring
Number Parent 1 Parent 2 (average spots) Offspring 1 Offspring 2 (average spots)
1 6 8 7 7 7 7
2 8 8 8 8 9 8.5
3 10 6 8 9 7 8
4 8 8 8 6 8 6
5 9 7 8 8 7 7.5
6 6 6 6 7 10 8.5
7 7 5 6 8 7 7.5
8 7 5 6 8 6 7
9 6 6 6 8 7 7.5
10 8 6 7 8 4 6
11 10 5 7.5 7 8 7.5
12 5 10 7.5 8 6 7
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1. Assessing the variation in spot number
In the space below, sketch—don’t copy in detail—the histogram showing the distribu,on of spot
number in your star,ng Le@ Field popula,on. Record the average number of spots: 7_____
2. Estimating the heritability of spot count
Record your data on parents and offspring for the ma,ngs you set up in the table below. When you
feel you have an accurate es,mate of the heritability of spot count, sketch—don’t reproduce in
detail—your scaIerplot in the space at right. Record your es,mate for the heritability of spot count:
Family # Spots #Spots Midparent # Spots # Spots Midoffspring
Number Parent 1 Parent 2 (average spots) Offspring 1 Offspring 2 (average spots)
1 6 8 7 7 7 7
2 8 8 8 8 9 8.5
3 10 6 8 9 7 8
4 8 8 8 6 8 6
5 9 7 8 8 7 7.5
6 6 6 6 7 10 8.5
7 7 5 6 8 7 7.5
8 7 5 6 8 6 7
9 6 6 6 8 7 7.5
10 8 6 7 8 4 6
11 10 5 7.5 7 8 7.5
12 5 10 7.5 8 6 7
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