<span>On a modern firearm, the feature that functions like the lock on a muzzleloader is the safety. The safety was added to modern guns to prevent them from accidentally firing, although it should be noted that a safety is a man-made mechanical device which makes it subject to failure at times.</span>
According to some scientists, if the earthy was to heat up that much then the polor ice caps would melt more and the sea level would rise potentially causing some areas of land to flood.
R is a dominant allele and r is a recessive allele. For the organism to be a homozygous individual, it would have to be either RR or rr. Since the organism is Rr (both alleles), it is heterozygous.
You can remember the difference between homozygous and heterozygous by the words' prefixes:
- the prefix homo- means "same"
- the prefix hetero- means "different"
