1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
N76 [4]
4 years ago
12

Which type of selection tends to increase genetic variation? A. Disruptive selection B. Directional selection C. Stabilizing sel

ection
Biology
1 answer:
aliina [53]4 years ago
7 0

Answer:

Which type of selection tends to increase genetic variation? A. Disruptive selection B. Directional selection C. Stabilizing selection

The Answer is option A (Disruptive selection)

Explanation:

Selection can either shift the mean value of a trait, reduce the trait's variation, or increase its variation.

Genetic variation which allows natural selection to increase or decrease frequency of alleles already in the population is a source of phenotypic variation as it refers to differences in all the hereditary information of members of the same species.

Disruptive Selection is important in maintaining variation and initiating speciation as it Increases Variation by favoring alleles corresponding to more extreme phenotypes. But for it to occur, the mean phenotype has to experience the lowest fitness. Disruptive selection affects the frequency distributions of alleles and genotypes within a population.

Disruptive selection is based on the variance of a trait in a population as it increases genetic variance by equalizing the frequencies of existing alleles at polymorphic loci (a genetic loci with two or more alleles). Disruptive selection maintains and may even increase variation in natural populations by favoring extreme phenotypes, individuals with extreme values for a trait have greater reproductive success than individuals with intermediate values.

You might be interested in
Four children in a family have four different blood types. If the father has
Natali5045456 [20]
I think BO or B, but BO has more chance.
6 0
3 years ago
Which level of biodiversity includes species richness and evenness?
Novay_Z [31]
The answer is:

Community Diversity.

Reason Why: Here is an example, say you have 2 communities, community 1 is A, and community 2 is B, Communities A and B contain 5 tree species, However because community B has greater species evenness it has greater species diversity.
Community A is dominated by one of its 5 species and so has lower species diversity than.....community B, which has the same 5 species but in equal proportion.

Richness- Number of Species
Evenness-Relative abundance.

Hope This Helped!
7 0
3 years ago
Read 2 more answers
Penicillium notatum is a mold that is the source of the antibiotic penicillin. Which is the reason for placing it in the phylum
mafiozo [28]
<span>Penicillium does not seem to have sexual phase</span>
3 0
3 years ago
Read 2 more answers
How did humans first alter crops? What method are scientists using today to change crops?
Luden [163]
The methods they are using now and days is cross fertalization. To make certain types of crops, and better/best celling crops
8 0
4 years ago
I need a small text (about 50 words) for the human brain.
Artemon [7]

Answer:

The human brain is the command center for the human nervous system. It receives signals from the body's sensory organs and outputs information to the muscles. The human brain has the same basic structure as other mammal brains but is larger in relation to body size than any other brains.The largest part of the human brain is the cerebrum, which is divided into two hemispheres, according to the Mayfield Clinic. Underneath lies the brainstem, and behind that sits the cerebellum. The outermost layer of the cerebrum is the cerebral cortex, which consists of four lobes: the frontal, parietal, temporal and occipital. [Nervous System: Facts, Functions & Diseases]

Like all vertebrate brains, the human brain develops from three sections known as the forebrain, midbrain and hindbrain. Each of these contains fluid-filled cavities called ventricles. The forebrain develops into the cerebrum and underlying structures; the midbrain becomes part of the brainstem; and the hindbrain gives rise to regions of the brainstem and the cerebellum.

Explanation:

4 0
3 years ago
Other questions:
  • Consider the following food chain: garden plants are eaten by snails, which are eaten by birds, which are eaten by the household
    7·2 answers
  • For the same cross: BbTt x bbTt a. Using the Probability Method illustrated in lecture, break the complex two-gene cross into tw
    14·1 answer
  • What are the main differences between DNA, Alleles, and Genes?
    8·1 answer
  • Which of the following prevents blood from flowing backward through the circulatory system?
    11·1 answer
  • Which structure is found in all animals
    13·2 answers
  • Liverworts and mosses were some of the earliest land-based plants. Which statement correctly explains why these species are stil
    8·2 answers
  • MY LAST TRY! WILL GIVE BRAINLIEST!!!! BLESS YOUR GRADES!!!!! EASY I JUST CANNOT DECIDE!!!!
    8·1 answer
  • Study the following statements, which compare the method of fermentation preferred by yeasts to they type of fermentation that m
    7·1 answer
  • If water is at 26 degrees c and has a salinity of ____, its density is 1.023 g/cm3
    9·1 answer
  • Any body come with me for test​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!