The evolution of sexual reproduction is a great puzzle in modern evolutionary biology. Many groups of eukaryotic organisms, especially most animals and plants, reproduce sexually. The evolution of sex between two organisms of the same species contains two related but different themes: its origin and its maintenance. However, since hypotheses for the origin of sex are difficult to test experimentally, most of the current work has focused on the maintenance of sexual reproduction. Biologists, including W. D. Hamilton, Alexei Kondrashov, and George C. Williams, have proposed various explanations for how sexual reproduction is maintained in a large set of different living things.
Answer:
B) The alleles are different
Explanation:
Hetero- different
zygous- you can best relate it to specific kind of zygote, or fertilized egg (which has two alleles)
<span>There is an EE possibility, 2 Ee's and 1 ee. For the earlobes to be not detached, it would have to be ee, as attached earlobes are recessive. and 1 out of 4 options is ee, so 3 out of 4 options would lead to detached earlobes
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3. 75%
Since the client is throwing tantrums and outburst, it is best to calm the client but taking an action of having to talk to him or her or try to get closer to him or her will likely provoke him or her into doing what he or she is currently doing. It is best for the nurse to calm the client by having to tell him or her that the nurse will leave and will be back as soon as he or she calms down.
