One parent has a dominant gene for a
1 answer:
The probability of a child with a bent thumb is out of 4 is 50%.
Explanation:
Information given:
dominant gene = straight thumb (genotype TT, Tt)
recessive trait = bent thumb (genotype tt)
from the question genotype of parents can be deduced:
Parent 1 = Tt
parent 2 = tt
from the Punnet square:
T t
t Tt tt
t Tt tt
From the results of Punnet square it is seen that 50% of progeny will be straight thumb and 50% of progeny will be bent thump.
phenotype ratio and genotype ratio = 1:1
There will be 50 % probability that one of their offspring will be with bent thumb.
progeny with bend thump percent = x100
= 50%.
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All of these organisms are made up of at least one cell. The fourth one (Euglena) is a <u>unicellular</u> organism (made up of 1 cell), and the rest are multicellular organisms (made up of many cells).
Incorrect Answers:
A.
All of these organisms are not only made up of cells, but more specifically these organisms are all made up of <u><em>eukaryotic</em></u> cells. This means that their cells have a nucleus. The other classification of cells (<em><u>prokaryotic</u></em> cells) do not have a nucleus. These are basically just bacteria, and there are no bacteria pictured in this problem, so this is a false answer choice.
C.
Some of these organisms undergo photosynthesis, but not all of them do. Photosynthesis is the process in which organisms convert sunlight, water and CO2 into glucose and oxygen. This is how plants (and some other special organisms as well) "make their own food". There are several organisms on this list that are not green plants, so this is a false statement.
D.
Although these organisms are all made up of eukaryotic cells (having a nucleus), their cells are definitely not identical. One major difference is that between a PLANT eukaryotic cell and an ANIMAL eukaryotic cell (***see pic below***). Other differences would be seen as well if we compared cells from all of these organisms under a microscope, so this is a false answer choice.
