Lethal main features.
OF CLASS 6
WHO WILL DO FIRST I WILL MART IT AS BRAINLIST
Answers
Answer:
In 1907, Edwin Baur began his work with the snapdragon plant Antirrhinum and characterized the condition aurea, in which plants had golden instead of green leaves (Baur, 1907; Castle & Little, 1910). When two aurea snapdragon plants were crossed, Baur observed a 2:1 ratio of green seedlings to yellow seedlings. Homozygous aurea plants lacked normal chlorophyll development and died either during the embryonic stage or when the plant seedlings were two to three days old. In other words, like Cuénot's homozygous mice, the homozygous aurea plants could not fully develop, so an entire class of progeny died (Castle & Little, 1910).
Answer:
We lost Kalpana Chawla in the Space Shuttle Columbia disaster which occurred on February 1, 2003, when the Space Shuttle disintegrated over Texas during re-entry into the Earth's atmosphere, with the loss of all seven crew members, shortly before it was scheduled to conclude its 28th mission, STS-107.