Awoman gives birth to a son who has type a blood. she has type ab blood. which of the following can be concluded from this about her parents' blood types?

one of her parents had at least one a allele and the other at least one b allele.
one of her parents had type ab blood.
one of her parents had type b blood and the other type a blood.
one of her parents had two a alleles.

answer: i don't know

explanation:

you need to provide a picture, otherwise i can't tell you.

if you can provide one, i'd be more than happy to you with this!

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.