It is heterozygous b/c the 2 letters are different, 1 being dominant and one being recessive.
It forms when a low pressure area is accompanied by thunderstorms that produce a circular wind flow with maximum sustained winds below 39 mph.
Vestigial organs are organs that we don't use but maybe our ancestor use this organ and the organ will evolve into smaller. Example : Appendix, Hair in chest, canine.
This theory come from J.B Lamarck
