Question 1a

Well, on to the first lesson!

You might find it really helpful to download this worksheet and print it out.  I strongly encourage you to try these exercises out for yourself and only when you think you're done (or are really stuck!) should you look at the solutions video!

Go to http://tinyurl.com/F17classical for the worksheet.

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Two true-breeding lizards were crossed.  Two mutant traits were found in the parents: bent tail and curled claws.  The F₁ lizards were all wild-type in appearance.  The F₁ females were testcrossed, and the offspring were sorted to obtain these data: 

Phenotype	Number
wild type	471
bent tail, curled claws	504
bent tail	11
curled claws	14

 

1. Define appropriate gene and allele symbols according to standard conventions.
2.  Map the distance between the two genes.

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The solution for the question is below.

(You can view a full-screen version by clicking on the YouTube logo at the bottom-right corner of the video above).