Question

You conduct a cross for two strains of aliens that are highly inbred (genetically identical with each strain) but differ from one another in both tail length and incubation time. Below are frequency histograms of your data for this experiment (hint: remember that standard deviation is the square root of the variance).

Calculate the broad sense heritability for each trait and briefly discuss any differences between the influence of the environment on variation in each trait. Also, mention what next experiment you would want to perform if you wished to breed aliens to give them longer tails and a faster incubator time.

Tail length F1 (black) versus F2 (grey) F1 mean = 76.3 cm F2 mean = 75.8 cm F1 standard deviation = 5.11 cm F2 standard deviation = 9.61 cm 57-63 cm 64-70 cm 70-76 cm 77-83 cm 84-90 cm 91-97 cm F1 F2 Incubation time F1 (black) versus F2 (grey) F1 mean = 7 days F2 mean = 7.1 days F1 standard deviation = 1.41 days F2 standard deviation = 1.77 days 3-4 days 5-6 days 7-8 days 9-10 days F1 F2

Answer 1

Answer: F1 --- 76.3 cm

F2 --- 75.8 cm

Standard deviation --- 5.11 cm and 9.61 cm

Formula --- F1 - F2 / standard deviation substraction

= 0.5 / 4.5

And we do back cross between the F1 progeny and one of the parent.