Answer:
2 children will have freckles
Explanation:
This question is just a play on words for the punnet square. You have a dominate trait , freckles, and a recessive trait, no freckles. Charlie has no genes for freckles, so he will be represented as 2 lower case letters. Stacey has both types of genes for freckles and no freckles, so she will be represented as 1 capital letter and 1 lowercase letter. I'll try to make a punnet square down below. Capital A represents the dominate trait and lowercase a represents the recessive trait.
A a
a Aa aa
a Aa aa
As you can see, 2 of her children have the dominate trait for freckles, and two of her children only have recessive traits, which means no freckles:)
Answer:
a. The original spraying has caused a permanent mutation, giving the insects genetic resistance to the spray.
Explanation:
This is a practical evidences of mutation and variation, as mechanisms of evolution.
The insecticide is the selective pressure. As a results of continuous spray, the parents of the present mosquitoes must have acquired certain characteristics or traits by gene mutation which makes them resistant to the selective pressure (insecticides), and therefore survive the spray in the past.
Therefore when these resistant parents mated, with high reproductive success (leading to large gene pool of these traits,); variation in the genetic composition increases as the resistant gene is passed from generations to generations in the population. Therefore, the population of present day mosquito with genetic resistance to insecticides increases.They are therefore naturally selected, and able to survive as the present day mosquitoes with high resistance to insecticides.
Answer:
p53 gene is an important gene that regulates the proper functioning of the cell. This gene plays an important role in the cell cycle progression and acts as genome guardian.
Any mutation in p53 leads to the formation of the different types of cancer cells. The p53 gene is activated by teh phosphorylation at the particular sites. High levels of phosphorylated p53 in the cell indicates that the cells DNA is highly damaged and mutated.
Answer:
Speciation, it's the formation of a new organism in evolution
It would be a vertebral foramen, you can always look up more info in google!
