In codfish, the gene for aggressiveness dominates over the gene for passivity.

In codfish, the gene for aggressiveness dominates over the gene for passivity.
a) Will it be possible to calmly pick up hybrid codfish obtained from crossing evil with sluggish ones?
b) What and how many (in percent) cod will turn out from crossing heterozygous animals with each other?
c) What is the ratio of phenotypes in cracklings obtained from crossing a passive crackling with a heterozygous female?
d) Describe in words the genotypes of animals from F1.
e) Can we say that aggressive codfish have different genotypes?

Answer: no / 75% angry, 25% sluggish / 1: 1 / heterozygote, rec.homozygote / yes.

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