Answer:
The chance is 0.25 or 25%
Explanation:
To determine the answer, one should utilize a Punnett Square. This tool illustrates the genetic combinations produced from the mating of two parent organisms, allowing visualization of how their alleles combine in offspring. The Punnett Square consists of a grid with eight boxes; one parent's alleles are arranged along the top row, and the other's are positioned down the first column. Each allele from one parent matches with the alleles from the other, filling in the remaining boxes. This results in a genetic probability for the potential offspring's traits.
For the question posed, the cross involving parents who both have Tt (Tt x Tt) alleles is represented below, using the Punnett Square.
T t
T TT Tt
t Tt tt
Within these results, we see that "tt" appears just once among the four possible offspring. Thus, we have a ratio of 1/4, which converts to 0.25, indicating a 25% likelihood that the offspring from this cross will exhibit the "tt" genotype.
I believe the first option should be 2, and for the second options, number 2 is right.
The digestive activity is regulated by mechanical and chemical receptors found in the walls of the tract organs.
