Answer:
The correct answer is D
Explanation:
The cell membrane is essentially composed of the following:
- phospholipids
- cholesterol
- proteins
The phospholipid consists of a <em>hydrophilic </em>phosphate 'head' and the tail is the <em>hydrophobic</em> fatty acid chain.When cellular membranes form,phospholipids collect into two layers in light of these hydrophilic and hydrophobic properties. The phosphate heads in each layer face the fluid or watery condition on either side, and the tails conceal away from the water between the layers of heads, since they are hydrophobic.
There are 3 main factors that greatly influence the fluidity of the plasma membrane:
- temperature
- cholesterol
- saturated and unsaturated fatty acids
In order for a recessive trait to be apparent in an organism, the organism must receive a copy of the allele for that trait from both parents.
Let the:
black coat: B
brown coat: b
Trotter: T
pacer: t
The offspring received both of the recessive alleles because it demonstrates the recessive phenotypes. Therefore, they genotype of the offspring is:
bbtt
The black horse that is a pacer that can produce this offspring will be:
Bbtt
Therefore, the brown horse's genotype must be:
bbTt
The offspring will receive b from both parents and t from both parents.
