50 percent of the offspring would be expected to have the ability to roll their tongues If a heterozygous male is crossed with a homozygous recessive female.
Explanation:
Information given:
the ability to roll tongue is dominant, the genotype would be RR, Rr
the inability to roll tongue is recessive trait the genotype = rr
Given that heterozygous male is crossed with homozygous recessive female, the genotype is
Rr X rr
Punnet square shows that:
     R    r
r   Rr  rr
r  Rr  rr    The genotype ratio is 1:1
                  phenotype ratio is 1:1
There are chances of 50 % offspring having the ability to roll their tongues as they are heterozygous and have the dominant allele for rolling of tongues. 
 
        
             
        
        
        
Answer:
Male with Turner syndrome has 44 autosome with X (monosmy) and female has 44autosomes with XO( female).
Male with klinefelter syndrome has 44+ XXY. this is mainly in males 
 
        
             
        
        
        
Answer:
It's a monocot
Explanation:
Six petals, long leaves, fits the description
 
        
                    
             
        
        
        
Your answer is (B.) 
Fossils in newer layers if rock are generally estimated to be younger than fossils found in the deeper layers because it is closest to the surface. The soil and earth didn't have enough time to "bury" the remains of the dead animal ( Bury is used for a simpler term) underground. The farther down a fossil is the more likely it is older unless the animal tends to burrow. Seeing as the question is probably talking of older animals that is unlikely for an animal to burrow that far. So your answer is B.
        
                    
             
        
        
        
Answer:
B
Explanation:
The statement typically depicts Ohm's law which can be mathematically represented as, I = V/R or V = IR. This representation means that as the current increases, the voltage also increases.