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Mnenie [13.5K]
3 years ago
7

Alleles resistant to organophosphate insecticides first appeared in Asia and were introduced into mosquito populations in the Un

ited States via _______; these alleles quickly became fixed via _______.
Biology
1 answer:
timofeeve [1]3 years ago
5 0
<h2>Mutation & genetic drift</h2>

Explanation:

  • A mutation is characterized as a lasting change to the DNA succession in a quality. This change moves the hereditary message conveyed by the quality and can modify the amino corrosive arrangement of the protein the quality encodes. This implies future cells created by the quality will just convey a specific characteristic.  
  • Genetic Drift is the change in the hereditary structure of a populace after some time because of possibility or irregular occasions. In instances of hereditary float, for example, catastrophic events or periods of irregular climate, the age that makes due to repeat won't really be the fittest, yet the most fortunate. Hereditary float doesn't allude to a particular change in hereditary cells, rather to arbitrary events that impact a population's genetic makeup.
  • Hence, the right answer of the fill up the blank is "mutation and genetic drift".

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What do you mean by responsible? Do you want to know the genetics behind it, what the surface markers do, or why they are metically important? I think I can help.
6 0
2 years ago
Genetic variation helps populations adapt to a changing
timama [110]

Answer:

Please find the explanation below

Explanation:

Sexual reproduction is the kind of reproduction that requires two organisms (male and female) to form an offspring. The male organism produces gametes called SPERM while the female organism produces gametes called EGG. These two gametes come together in a process called FERTILIZATION to produce a zygote, which develops into an offspring.

In sexual reproduction, gametes are produced by organisms involved via a process called MEIOSIS. Meiosis, however, reduces the chromosome number of the gametes by half. However, one process unique to only meiosis and sexual reproduction is called CROSSING OVER.

Crossing over is the process whereby chromosome segments is exchanged between non-sister chromatids of homologous chromosome. This process causes a recombination of chromosomes (alleles) in such a way that the gametes will be genetically different from the parent organisms (genetic variation). According to this question, sexual reproduction leads to more genetic variation than asexual reproduction due to the process of CROSSING OVER that occurs in sexual reproduction.

4 0
3 years ago
What force causes the air to change directions in global circulation patterns ?
Ad libitum [116K]

pressure gradient force

3 0
3 years ago
Inadequate intake of which nutrient during the first few weeks of pregnancy is associated with spinal cord defects in the fetus?
Rus_ich [418]
Folate also known as folic acid
6 0
3 years ago
The PCR primer ‘D7S820’ is used to amplify the D7S820 locus. Using this gel below, determine whether each person (M1, P1, P2, C1
Ahat [919]

Answer:

1) M1 is heterozygous since it contains 2 bands, which means that it contains one recessive and one dominant allele

P1 is homozygous for this locus, since it contains a single band or is known to be homozygous for the locus or gene.

P2 is hetozygous for this locus because two bands appear in which each band represents one allele for the gene.

ChildC contains two gel bands, representing two alleles and is therefore heterozygous

P1 is the father of the child C1, if we look at the gel, each father shows a similar band, one coinciding with the mother and the second with the father p1

As for the paternity study, the PCR test is not useful, since it provides asymmetric results, thus only one strand information will be provided, and because the DNA is double-stranded, a more complete study is required.:

3 0
3 years ago
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