Answer:
No, it is not.
Explanation:
Looking at this chart, this looks to me to be a case of an x-linked recessive disease. (If you want to know how to tell, or got some context that this is not the case, let me know)
Remember that females have two x chromosomes and males have one x and one y chromosome. As this disease is recessive, this means that for a female to exhibit the disease, she must have both x chromosomes have the disease. If she only has one x chromosome with the disease, she's considered a carrier.
On the other hand, males are completely binary, as they only have one x chromosome - either their x chromosome has the disease, and they exhibit it, or their x chromosome does not, and they do not have the disease, nor do they carry it. Thus, males can also not be carriers.
A square on the chart is representative of a male, while a circle is a female. IV-2 is a square, thus he is a male. This means that he cannot be a carrier, so your answer is no.
If any of this doesn't make sense, feel free to let me know! Hope this helps.
The answer is B. They are in control of the experiment, they can change it the variables to better help the experiment.
Answer AND Explanation:
Let H represent gene for normal blood clotting and h for haemophilia.
XH Y
Xh XHXh XhY
Xh XhXH XhY
Male children with hemophilia: 50%
Male children without hemophilia:
0 %
Female children with hemophilia: 0%
Female children that are carriers for hemophilia: 50%
Yes you can choke on just about anything even air
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