|
Linkage not only keeps traits apart, it can also keep traits together. If you start with a snow ("aaee") and cross it to a normal ("AAEE") the offspring will inherit "ae" and "AE" instead. Notice that the mutant alleles are stuck together this time instead of being stuck apart. As before, 90% of the time the offspring of such a "double het" will inherit both traits together. Almost 1 in 4 of their offspring will express both traits, as opposed to the usual 1 in 16. It will be difficult to separate them. Sex-linked TraitsTo compare the difference between normal single-locus traits and sex-linked traits, let's first review the behavior of traits controlled at a single locus on paired chromosomes. (Also known as autosomal traits.)Figure 1 shows the results for an autosomal recessive trait where "A" is dominant to "a." Like before, FOIL can be used to determine the possible outcomes. Since the "a" mutant is recessive, only "aa" individuals are mutants.
[Home] [Digital Editions] [CMG Genetics Tutorial] [Serpwidgets Genetics] [Links] [Contact] Cornsnake Morph Guide is a registered trademark of Charles Pritzel All content on this site is copyright © 2004-2012, Charles Pritzel |