Is this normal male/female debate about a true normal or a visual debate? For example, I totally see the sense in a co-dom male to normal female, but with recessive genes, neither animal can be a true normal for you to produce visual (homozygous) offspring. When it comes to recessive genes, I would think you would want the female to be homozygous and the male be heterozygous. I say this because a female takes 2 to 3 years to mature and a male takes 1 year to 18 months. If the male is the het, then he can be replaced by a homozygous male offspring and you will have both a male and female that are homozygous in less time than having to replace a heterozygous female with a homozygous female offspring. Just my two cents.