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kupik [55]
4 years ago
6

What began as a single fertilized egg has just separated into two distinct eggs. this indicates the formation of _____ twins tha

t has occurred during the _____ period of development?
Biology
1 answer:
salantis [7]4 years ago
3 0

The above statement indicates the formation of monozygotic twins that has occurred during the blastocyst period of development.

<u>Explanation:</u>

When a single fertilized egg has just separated into two distinct eggs, it indicates the formation of monozygotic twins that has occurred during the blastocyst ( 2 celled) period of development  

Usually a female during the mensural cycle releases one egg from one of the fallopian tube, whereas 1% of the females release 2 eggs from the fallopian tubes causing the formation of dizygotic twins but if it is from a single egg then they are said to be mono-zygotic twins.

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You are involved in an experiment involving fluorescent painting of chromosomes. You observe the following in a nucleus experien
Galina-37 [17]

Answer:

It seems that a reciprocal translocation is going on.

Explanation:

A translocation occurs when a chromosomal fragment changes its location in the same chromosome from the original to a new one. Or when it leaves the chromosome to re-locate in a new different chromosome.

According to this, there are different types of translocations:

  • Intrachromosomal translocations:
  1. Intra-radial: the change in position occurs in the same arm of the chromosome. For instance, 123.456789 → 123.478569
  2. Extra-radial: The change in position occurs from one arm to the other of the same chromosome. For instance, 123.456789 → 15623.4789
  • Extrachromosomal translocations:
  1. Transposition: not reciprocal interchange. The fragment leaves a chromosome to re-locate in another chromosome. The other chromosome does not send any fragment to the first one.
  2. Reciprocal translocation: There is a reciprocal interchange. A fragment of chromosome A goes to B, and a fragment of chromosome B goes to A.

Reciprocal translocations might be:

  1. Fraternal: the interchange occurs among homologous chromosomes
  2. External: the interchange occurs among non-homologous chromosomes

Reciprocal translocations are easily recognized during meiosis because an association between four chromosomes can be observed.  This association is a quadrivalent structure.

During metaphase 1, the centromeres involved in the quadrivalent originate centromeric co-orientation or disjunction.

4 0
3 years ago
List three specific functions of capsules.
Tema [17]
Function. The capsule is considered a virulence factor because it enhances the ability of bacteria to cause disease (e.g. prevents phagocytosis). The capsule can protect cells from engulfment by eukaryotic cells, such as macrophages. ... Capsules also contain water which protects the bacteria against desiccation.

I hope this helps :)
4 0
3 years ago
A characteristic 9 + 2 arrangement of microtubules, consisting of nine doublets of microtubules surrounding a pair of single mic
AlexFokin [52]

Answer:

Motile cilia and flagella

Explanation:

Both motile cilia and flagella consist of a central bundle of microtubule that is known as axoneme. The axoneme consists of nine doublets microtubules that surround a pair of the central single microtubules. This arrangement of microtubules in the cross secretion of flagella and motile cilia is called 9+2 arrangement.

Each of the 9 doublet microtubules consists of A and B tubules. Additional accessory proteins are associated with the 9+2 microtubules to make then stiff and elastic.

5 0
4 years ago
HELP!! WILL INCLUDE LINK
ankoles [38]

First of all, I want to say that I was literally learning about this stuff not 10 minutes ago. That is a re.tardedly creepy coincidence.

1.) Science is used mostly through the field of forensics in order to study crime scenes, collect data like fingerprints and hair fibers to try to identify the suspect, as well as use things like blood splatter to try to recreate what happened during the crime. this data is then used as evidence, either for or against a suspect, in order to sway the jury's opinion.

2.) Television shows like CSI have certainly raised awareness. Forensics, which was a formally unknown and untalked about profession is now in the spotlight. However, it can lead to some problems, such as skewing jurors' expectations of what to expect from forensic specialists.

3.) The scientific method consists of five steps:

-Make an observation.

-Ask a question.

-Form a hypothesis, or testable explanation.

-Make a prediction based on the hypothesis.

-Test the prediction.

The feedback loop occurs when you use the end conclusion to form another hypothesis to another experiment. Essentially, the feedback loop means that you are continually improving upon your experiment.

4.) In a criminal trial, a suspect or defendant is being accused of a crime. It is up to the prosecutor to prove that the defendant is guilty of that crime. It is up to the defense attorney to defend the defendant and prove that he is not guilty. It is up to the judge to listen to all the evidence and afterwards to give his verdict. The scientists can be used by either the prosecutor or defense attorney to bring forth evidence that can support either of their sides.

5.) Control samples are any type of well-known forensic samples that are used to assure analysis is properly performed so that results are reliable.

6.)It was helpful for scientists to compare results from the burnt debris and unburned background material from the area to see if the gasoline was present in the unburned samples.

7.) The analytical sciences used in the courtroom are very reliable because they go through careful screening and are measured against control samples so that they are accurate.

8.) Bias can seriously mess up a case. Say, if the forensic scientist in charge of testing and taking samples from the crime scene is an acquaintance of the suspect, he could purposely mess up the testing so that he clears his friend.

3 0
3 years ago
10. How would sheep be kept and fed in an extensive grazing system?
dusya [7]

Answer:

c

Explanation:

plz mark brainliest

4 0
4 years ago
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