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
oksano4ka [1.4K]
3 years ago
5

Which statement describes a step in DNA replication?

Biology
2 answers:
enyata [817]3 years ago
8 0
A) <span>The double helix unwinds and each strand forms a template for a new strand.

Hope this helps!</span>
Makovka662 [10]3 years ago
6 0
I think the best answer would be the first 1
You might be interested in
In watermelons, bitter fruit (B) is dominant to sweet fruit (b), and yellow spots (S) are dominant to no spots (s). The genes fo
lubasha [3.4K]

If an F1 plant is backcrossed with the sweet, unspotted parent, the phenotypic proportion that is expected in the offspring will be in the ratio of 1:1:1:1.

<h3>What is Backcross?</h3>

Backcross may be defined as a type of cross where the F1 hybrid is crossed with either the recessive or dominant traits.

This question typically represents a dihybrid cross implicating two genes, one coding for fruit taste and the other for spot color. The allele for bitter taste (B) and yellow spot (S) is dominant over the allele for sweet taste (b) and no spot (s) respectively.

So, a heterozygous F1 resulting from a cross between a purebred dominant (bitter fruit, yellow spot) and purebred recessive (sweet fruit, no spot) will have a BbSs genotype.

When the F1 hybrid BbSs is backcrossed with the sweet, unspotted parent (bbss), the phenotypes with their proportions are given below:

  • Bitter fruit, yellow spot (BbSs, 1)
  • Bitter fruit, no spot (Bbss, 1)
  • Sweet fruit, yellow spot (bbSs, 1)
  • Sweet fruit, no spot (bbss, 1).

The Punnett square of this cross is described below:

Therefore, if an F1 plant is backcrossed with the sweet, unspotted parent, the phenotypic proportion that is expected in the offspring will be in the ratio of 1:1:1:1.

To learn more about Dihybrid cross, refer to the link:

brainly.com/question/8083392

#SPJ1

7 0
2 years ago
Which of these was NOT characteristic of the first cells on Earth?
shtirl [24]
The answer is D contained organelles
5 0
3 years ago
Read 2 more answers
Causas, consecuencias, prevencion y medidas de solucion sobre la falta de agua en el mundo
m_a_m_a [10]
Http://www.madrimasd.org/blogs/remtavares/2010/05/28/131465

<span>Creo que este sitio web puede ayudarle.</span>
6 0
3 years ago
You observe a high proportion of malarial infections in a small village located in Angola. Malaria is caused by the protozoan Pl
svet-max [94.6K]

Answer:

<em>B and C.</em>

Explanation:

The epidemiological triangle is an illustration of interaction among suitable hosts, disease agents, and the environment that drives successful outbreak of diseases.

In order to successfully tackle or reduce the incidence of a disease, the triangle has to be broken.

<em>In the case of malaria which is caused by plasmodium but spread through the female anopheles mosquito, one way of breaking the epidemiological triangle is to eliminate female anopheles mosquito in the environment using any possible means. This will stop the spread of the parasite and hence, the disease.</em>

<em>Another way to reduce/prevent malaria is to prevent the vector, female anopheles mosquito from getting to the host, the human populace. This can also be achieved by several possible means.</em>

Relocating the entire village to a neighbouring village might not break the epidemiological triangle as long as female anopheles mosquito still abounds. In the same vein, antibacterial drugs will not help to treat malaria. However, instructing residents on personal protective measures and controlling the vector through chemical larvicides will go a long way in breaking the triangle and reducing the incidence on the malaria disease.

<em>The correct options is B and C.</em>

5 0
3 years ago
What is carrying capacity?
KengaRu [80]
Carrying capacity is the amount that a vehicle can carry or the amount that it is capable of carrying. 
4 0
3 years ago
Read 2 more answers
Other questions:
  • 1) Your muscles provide a framework that supports and protects your body? T or F?
    9·1 answer
  • which renewable energy source is most likely to become non renewable if we as consumers aren't careful? biomass energy geotherma
    11·2 answers
  • If you deleted the dna promoter sequence of a gene, what would happen at the rna level? the dna helicase would not be able to re
    9·1 answer
  • A group of scientists are studying a crab. After comparing the crab to other crabs and testing its DNA, the scientists think the
    13·1 answer
  • Explain how genes are expressed for a particular<br> trait.<br> DONE
    5·1 answer
  • NEED ANSWER QUICK, WILL GIVE BRANLIEST!!!
    9·1 answer
  • Researchers can manipulate the genes of a mouse so that a single gene in a single tissue either produces an inactive protein (a
    14·1 answer
  • Define the photosynthesis?​
    13·2 answers
  • What type of energy is present in lightning?
    6·2 answers
  • What can a deficiency of growth hormone during bone formation cause?.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!