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You have two Holland Lops. One is a buck with normal fur – his genotype is L L. The other is a doe with normal fur that carries the recessive wool gene (L l). You may breed these two rabbits together. Also, you may breed the offspring back to a parent (this is called line breeding, which is practiced in rabbit breeding, both by breeders and in nature). You can also breed the offspring together. This is called inbreeding (also practiced by breeders and in nature).
Bonus: Would you consider the normal fur gene to be completely dominant or incompletely dominant?
You have a Holland Lop buck. He is a handsome devil of about four pounds. You cannot tell from looking at him whether he is a true dwarf or a false dwarf.
By evaluating the offspring from his breedings, how could you figure out whether he is a true dwarf or a false dwarf? You may use known true dwarf does and/or known false dwarf does.
How would your plan change if you only had false dwarf does available?
Use Dw to show the normal gene and dw for the dwarfing gene.
Dw-Dw is a false dwarf or “normal”
Bonus: Would you consider the normal gene to be completely dominant or incompletely dominant?
Question 3
Holland lops are shown in two groups: solids and brokens. It is important to have rabbits to show in both groups to be completitive.
Part A: All of your bucks are solid. Half of your does are solid. Half of your does are broken. If your litters are born solid or broken exactly as the Punnet squares predict, how many brokens and how many solids would you have in your first 100 offspring?
Part B: Every time you breed, you choose a solid buck and a broken doe OR you choose a broken buck and a solid doe. If your litters are born solid or broken exactly as the Punnet squares predict, how many brokens and how many solids would you have in your first 100 offspring?
Part C: You want to produce as many brokens as solids. But sometimes, your very best matches between bucks and does are solid to solid. What can you do in your barn to keep the number of brokens and solid balanced?
Charlie (double broken pattern – usually not showable) - En En
Broken – En en
Solid – en en
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