In mice, agouti fur is a dominant trait resulting in individual hairs having a light band of pigment on an otherwise dark hair shaft. A mouse with agouti fur is shown here, along with a mouse with solid color fur, which is the recessive phenotype (A = agouti; a = solid color).
A separate gene, which is not linked to the agouti gene, can result in either a dominant black pigment or a recessive brown pigment (B = black; b = brown).
A litter of mice from the mating of two agouti black parents includes offspring with the following fur colors:
a) solid color, black
b) solid color, brown (sometimes called chocolate)
c) agouti black
d) agouti brown (sometimes called cinnamon)

The answer is given below

Explanation:

The 2 traits of the agouti fur mice are determined by non linked genes, which assort independently.

For this purpose we will use the multiplication rule to calculate the probability of agouti brown offspring  (A_ bb) from AaBb parents.

The probability of A_ offspring is 3/4 and the probability of offspring bb is 1/4.

The total probability will be 3/4 x 1/4 = 3/16.

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.  

the tricuspid valve is present between right atrium and right ventricle