Answer:
In the case of HIV-1, this loss-of-function mutation has proven to be beneficial.
Explanation:
Loss-of-function mutations are those that result in a gene product that has less or no function compared to the unmutated gene. When the allele completely loses function, (null allele), it is called an amorphous mutation. Phenotypes associated with these mutations are usually recessive, except when the organism is haploid, or when the reduced dosage of the normal gene is not sufficient to produce a normal phenotype (this phenomenon is called haploinsufficiency).
As mentioned earlier, this type of mutation results in a defective gene, but the text shown in the above question shows an example of a beneficial loss-of-function mutation because this mutation provides resistance to HIV-1 infection.
Answer:
The luteal phase begins after ovulation. It lasts about 14 days (unless fertilization occurs) and ends just before a menstrual period. In this phase, the ruptured follicle closes after releasing the egg and forms a structure called a corpus luteum, which produces increasing quantities of progesterone.
Explanation:
Answer:
left atrium
Explanation:
blood coming from lungs is oxygenated blood which is then carried to left atrium by pulmonary veins
The best answer is true. Taste buds encourage a desire for a variety of flavors, which also stimulates our appetite for foods. Taste buds are sensory organs that are located on the tongue which allows you to experience foods that are sweet, sour, salty and bitter.
You should consume the least amount of dairy products.
