Is it enough for a female to have 1 dominant gene, or do both genes have to be dominant for her to have a disease (for example is X(R) X(r) enough ti get the trait or does it have to be X(R) X(R) )?

In this case most diseases are recessive, but If there is even one dominant allele then it will show over

Explanation:

hope it helps

I think that if the disease is dominant it may show off if it is not it will not because two recissive gene are needed to show of

Explanation:

The gases and dust particles thrown into the atmosphere during volcanic eruptions have influences on climate. Most of the particles spewed from volcanoes cool the planet by shading incoming solar radiation. The cooling effect can last for months to years depending on the characteristics of the eruption.