What was the main environmental issue in this case?

Pink eye is a recessive trait found in deer mice. In a cross between two individuals, both of whom are heterozygous for the pink

gladu [14]

Answer:

See the answer below

Explanation:

If pink eye is recessive, it means that the normal eye is the dominant trait. According to Mendelian law, the ratio of normal to pink eye in a cross involving two heterozygous mice should be 3:1.

Chi-square = $\frac{(O - E)^2}{E}$ where O = observed frequency and E = expected frequency.

Phenotype Observed Expected Chi-square

Normal 18 3/4 x 20 = 15 $\frac{(18 - 15)^2}{15}$ = 0.6

Pink 2 1/4 x 20 = 5 $\frac{(2 - 5)^2}{5}$ = 1.8

Total Chi-square = 0.6 + 1.8 = 2.4

Degree of freedom = 2 - 1 = 1

Critical Chi-square value at 95% = 3.841

The critical Chi-square value is more than the calculated value. Hence, the observed number of offspring fits the expected number of offspring.

3 0

3 years ago

Earth’s continents are constantly in motion because they sit on top of gigantic plates which float on Earth’s mantle. Energy fro

Andrej [43]

Answer:

a. biomes

Explanation:

Ecology can be defined as the scientific study of the relationship between living organisms such as plants and animals in relation to their physical and biological environment.

An ecosystem can be defined as the natural living habitats of both living and non-living organisms, in which they interact with one another. Essential services such as plant pollination, water purification, nutrient cycling etc that are being provided by the ecosystem are really very vital, important and useful for the sustenance of life, both for humans and enhances social welfare.

Generally, the different continents on Earth are in a constant motion due to the fact that they're sitted on top of gigantic plates floating on Earth’s mantle.

Furthermore, the Earth’s core generate energy which also creates convection currents in the molten layer of the Earth, thereby, moving the plates.

Over an extremely long periods of time, the movement of these plates create new biomes.

In Ecology, a biome can be defined as a relatively distinct terrestrial region which is made up of animals, micrograms and plants, and it is typically characterized by similar environmental factors such as wind, relative humidity, rainfall, temperature, etc., irrespective (regardless) of where it occurs in the world.

There are five (5) main types of biomes and these are;

I. Forest.

II. Aquatic.

III. Desert.

IV. Grassland.

V. Tundra.

7 0

3 years ago

Explain how the grunion depends on the changes in tide for the survival of its species.

liraira [26]

Answer:

These creatures depend on the sea water for nutrients, protection and to move about. At low tide,many of these creatures are exposed to the air, leaving them at risk of predator attacks andoxygen depletion. The whole eco-system of the tide pools would simply not exist without theconstant movement of the tides

Explanation:

4 0

3 years ago

From which one of these items will water evaporate at a different rate?

Irina-Kira [14]

From which one of these items will water evaporate at a different rate?a. Factory

8 0

3 years ago

Read 2 more answers

Describe the steps that your body takes when building immunity.

Sergio [31]

Answer:

Explanition:

The immune system is made up of special organs, cells and chemicals that fight infection (microbes). The main parts of the immune system are: white blood cells, antibodies, the complement system, the lymphatic system, the spleen, the thymus, and the bone marrow.

4 0

3 years ago