Answer:
The classic tool to predict the patterns of heredity is using a <u>Punnett Square</u>.
Explanation:
In genetics, a trait can be considered dominant or recessive. Since the important discoveries of Gregor Mendel, scientists use a <u>capital letter (D) to indicate a trait is dominant, and a lowcase letter (d) to show a trait is recessive. </u>
Assuming that a scientist knows the genotype for the desired trait they want to predict on the offpsring, a Punnett Square is<u> a reliable tool and a graphic representation that permits them to visualize the potential features of the offspring by showing how the alleles may be exhibited and passed on the offspring and will determine the possible combination of genotypes.</u>
<em>How does it work?</em>
For example, as we can observe in the image below, both parents are homozygous for a trait <em>PP=Purple; pp=white</em>. P is dominant and p is recessive (the color purple will be dominant, and the white will be recessive). So, we put one parent's genotype in the top row (PP) and the other parent's genotype in the left column (pp) and combine one of each letters on the squares, <em>i.e</em>. one of each parent's alleles. Then, we can observe in the results that 3 of the offspring will exhibit the purple color (PP, Pp, Pp) and only one will exhibit the white recessive color (pp); or more properly known as a genotypic ratio of 3:1.
 
        
             
        
        
        
Answer:
Gene for blood type O is recessive 
Gene for blood type A and B is dominant 
Gene for blood type AB is neither dominant nor recessive but a form of co-dominance
Explanation:
In the ABO blood group,  
A and B are dominant genes, O is recessive genes.  
So the different genotype and its corresponding phenotype is as follows –  
Genotype    Phenotype
AO    	A
BO    	B
AB    	AB
AA    	A
BB    	B
OO    	O
Hence, the two alleles AB occur and express together. Therefore, AB blood group is an example of co-dominance.  
Blood type also varies with the presence of Rh factor. If Rh factor is present, the blood type will represented with a “+” symbol. And if Rh factor is absent, the blood type will be represented by “-“symbol.
 
        
             
        
        
        
Answer:
B. Dominant for one trait and recessive for the other
Explanation:
using the Punnetts square for the question above, the 9 in the ration refers to a dominant for both traits such as AABB, AaBb. 
while the 3: 3 refers to a dominant for a single trait and recessive for one such as AAbb, Aabb, aaBB, aaBb
and the 1 refers to recessive for both traits such as aabb.
 
        
             
        
        
        
Answer:
I'm guessing because there is a more likely change that bacteria will infect the wound because of the bacteria in the water
 
        
             
        
        
        
Answer:
d. all of the above
Explanation:
Geographic means anything to do with the terrain or land. Isolation can happen for any amount of time, so you never know what the new population might be.