Answer AND Explanation:
Let H be for normal blood clotting gene.
XH Xh
XH XHXH XHXh
Y XHY XhY
The probability of the couple having a hemophilia sex-linked trait is 25% and 75% for normal children.
Answer:
In the mid-1800s, over-hunting of Northern Elephant Seals reduced their population size to fewer than 40 individuals. However, the population has since rebounded to over 100,000 animals. The population went through a _<u>bottle neck event (genetic drift)</u>_, which makes it more susceptible to _<u>developing a genetic disease</u>_.
Explanation:
Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure-bottleneck effect- or because of a population split -founder effect-
. The bottleneck effect most likely affects smaller populations.
In the exposed example, extensive hunting acted as a pressure that reduced the number of Northern elephant seals to fewer than 100. This population experienced one or many generations of small size since these animals were affected by hunting. As the survivors did not have the whole genetic pool of the original population, the <em>population size might have recovered to a current population size of 100,000 individuals</em><em>,</em><em> but the genetic pool might have not</em><em>.</em> When the small population increases in size, it will have a genetically different composition from the original one. In these situations,<em> there is a reduced genetic variability, with a possibility of developing a peculiar allelic component</em>. If the <em>survivors in the population carried or developed a mutation, probably this mutation passed from generation to generation</em>. It will involve <em>more individuals each time and</em><em> increase the probability of developing a genetic disease.</em>
Answer:
I hope this works good luck! http s://www .the guardian. com/enviro nment/2018/oct/30/humanity-wiped-out-animals-since-1970-major-rep ort-finds
Explanation:
there are spaces cuz i cant post a link so ull have to take out the spaces
C. Microscope
They were able to get magnification like never before
Answer:
a. The size of their population
Explanation:
If the number of wolves increases but their food supply does not, there will be greater competition for the food.
b. is wrong. The amount of oxygen would have no effect on the competitiveness of the wolves.
c. is wrong. If the amount of food available increases, the wolves will have less need to compete for their food.
d. is wrong. If the area into which the wolves are expanding is like their current habitat, it will contain more food for them. They will have less need to compete.
