Kimiko has a pet salamander. She notices that part of his tail is missing. After a while, Kimiko sees that her salamander has his whole tail again. How did cell division play a role in this change in the salamander?
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Other animals, such as salamanders, frog tadpoles and fish, can also regenerate their tails, with growth mostly at the tip. During tail regeneration, they all turn on genes in what is called the 'Wnt pathway’ – a process that is required to control stem cells in many organs, such as the brain, hair follicles and blood vessels.
A pair of fruit flies reproduces and has 1,000 offspring. All 1,000 of the offspring have the alleles Gg. What is the most likely combination of alleles that each parent has, and why are other combinations not likely?
1 answer