Delta that question is easy
Answer:
0.2 or 20%
Explanation:
Assuming that the population is in Hardy-Weinberg equilibrium:
p + q = 1
p² + 2pq + q² = 1 where,
p = frequency of dominant allele
q = frequency of recessive allele
p² = frequency of homozygous dominant genotype
2pq = frequency of heterozygous genotype
q² = frequency of homozygous recessive genotype
Here,
since the trait is autosomal recessive, q² = 4% or 0.04
Frequency of recessive harmful allele = q
= √0.04
= 0.2 or 20%
Answer:
Natural selection can cause microevolution (change in allele frequencies), with fitness-increasing alleles becoming more common in the population. ... Natural selection can act on traits determined by alternative alleles of a single gene, or on polygenic traits (traits determined by many genes).
Explanation:
Answer:
If the sun was farther away from Earth
Explanation:
Immunological memory accounts for the ancient observation that someone who had recovered from the plague could safely care for those newly diseased.
Significance of plague disease
The plague is a contagious sickness that affects both animals and people. Bacteria named Yersinia pestis causes it.
- This bacteria is prevalent in rats and their fleas around the world, including in the United States.
Sunlight and drying are both effective in killing Y. pestis.
- Even yet, when discharged into the air, the bacteria may live for up to an hour, however, this might vary depending on the environment.
- Pneumonic plague is one of several types of plague. These types may occur independently or in combination, depending on the circumstances:
- When Yersinia pestis attacks the lungs, it causes pneumonic plague. This disease can spread from person to person via the air.
Transmission can occur if a person breathes in aerosolized germs, as could occur in a bioterrorist strike.
- Pneumonic plague can also be disseminated by inhaling Y. pestis suspended in respiratory droplets from a person (or animal) infected with the disease.
- In order to become infected in this manner, you must generally come into direct and personal touch with the sick person or animal.
- If a person with bubonic or septicemic plague goes untreated, the germs can migrate to the lungs and cause pneumonic plague.
The most frequent type of plague is bubonic plague.
- This happens when an infected flea bites someone or when materials contaminated with Y. pestis enter through a skin breach.
- Patients have enlarged, sensitive lymph nodes (known as buboes), as well as fever, headache, chills, and weakness.
Hence, the correct answer is option D
Learn more about plague here,
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