Topic 1.2
4. Colour vision deficiency is a recessive X-linked trait. A woman who has normal
vision and is not a carrier for vision deficiency marries a man who has colour
vision deficiency. What is the probability that they will have a child who has colour
vision deficiency? It may be useful to complete a Punnett square.
Probability of child with vision deficiency:

50%

Explanation:

i'm going to do a punnet square below. so the man has 1 x-chromosome and 1 y-chromosome but i'll capitalize his x because color deficiency is on the x chromosome. the woman is xx and both lower case because she is not a carrier

            woman

                x       x

X           Xx        Xx

y             xy         xy

b brown mice / white sand dunes

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.