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genotype question, help?
If an individual has the genotype “Aa” why will his sperm contain EITHER the “A” allele or “a” allele, but not both?
1 Answer
- BPLv 71 decade agoFavorite Answer
Because sperm (and eggs) each contain only half the genetic information necessary to create a new organism. Together the 2 halves make a whole.
It is possible sometimes though, that a sperm or egg is created that contains both or neither. It does happen once in a while. Sometimes it makes no difference to the organism, but usually it's not a good thing.
Source(s): bp
