Answer:
Mother - bb XAXa
Father - Bb XAY
Son - Bb XaY
Daughter - bb XAXa
Explanation:
Given –
Mother has blue-eye and normal vision
Son has brown eye and is color blind
Let the allele for Blue eye be represented by “b” and the allele for brown eye be represented by “B”
Given brown (B) is dominant over blue (b), thus both BB and Bb represents brown color eyes
Color blindness is associated with X gene
Thus Xa represents X –linked recessive colorblindness
And XA represents normal vision
Genotype of blue-eye and normal vision mother is bb XAXa . Mother is the carrier of recessive allele Xa for color blindness
Since son is color blind , his genotype would be Bb XaY
So fathers genotype would be
Bb XAY
Daughters genotype bb XAXa
The tilt in the axis of the Earth is called its obliquity. This angle changes with time, and over about 41 000 years it moves from 22.1 degrees to 24.5 degrees and back again. When the angle increases the summers become warmer and the winters become colder.anation:
A whelk is a carnivore: <span>True whelks are carnivorous, feeding on worms, crustaceans, mussels and other molluscs, drilling holes through shells to gain access to the soft tissues</span>
Last one - Biodiversity is the diversity of species in an area, which makes an ecosystem better prepared for major changes
Explanation:
If one crop struggles to grow then there will be plenty of others to substitute it. If a prey animal is dying at a faster rate and harder to find, predators can have other prey options and so forth. Biodiversity makes it so ecosystems can get past change.
Discontinuous variation <span> refer to large, conspicuous differences from the parents</span>
This is where individuals fall into a number of distinct categories, and is based on features that cannot be measured across a complete range
continious variation refer to small, indistinct differences from the normal condition.
Milk yield in cows, for example, is determined not only by their genetic make-up but is also significantly affected by environmental factors such as pasture quality and diet, weather, and the comfort of their surroundings
