The male rabbit's genotype is and the female rabbit's genotype is Answer choices
A: AA, aa
B: Aa, Aa
C: aa, aa
D: Aa, AA

The trp operon in e. coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

All phases of matter may have a fixed mass

Darwin’s hypothesis about how life changes over time is now called?