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krek1111 [17]
3 years ago
7

Explain how a testcross can provide evidence for or against linkage.

Biology
1 answer:
MrRa [10]3 years ago
7 0

Answer:

Testcrosses clarify linkage because each phenotypic class of progeny corresponds to each gamete type produced by the dihybrid parent.

Explanation:

  • A test cross involves the crossing of an individual with another phenotypically recessive individual so as to determine the zygosity of the former by analyses of the proportions of offspring phenotypes.
  • In order to determine linkage, the test cross shows that if the parentals are more than the recombinants, we can say that the two genes such as b and c  are genetically linked and therefore, they must be on the same chromosome.
  • Also, the test-crosses help to find out which alleles came from which parent.
  • By setting up testcrosses in which one parent is homozygous for the recessive alleles of both genes,we can analyze the gene combinations received in the gametes from the other, doubly heterozygous parent.
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<h2><u>EARTH'S MAGNETIC FIELD</u></h2>

The magnets point North when the Earth's magnetic field has?

<h2><u>ANSWER</u></h2>

I think the best answer for this question is Magnetic Reversal or Geomagnetic Reversal.

In geomagnetism, the term "geomagnetic reversal" also known as 'flip', is the process by which the North pole becomes South pole and the South pole transforms into North pole.

<h2><u>THE MAGNETIC REVERSAL</u></h2>

The reversals happen on rare occasions when iron molecules start moving towards the opposite direction as other iron molecules around them within the Earth's spinning outer core.

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2 years ago
Which of the following would most likely be found in a wide valley
iris [78.8K]

Answer:

Nothing

Explanation:

No options found and you asked us to pick from the following

7 0
3 years ago
Which is an example of the bottleneck effect? Green beetles move to a new location and build a new colony there. Green beetles s
hram777 [196]
A bottleneck is very narrow, which means that only a portion of the contents of the bottle cat get out (at the time). 

From this effect, people use the word bottleneck when only a few individuals of a population survive: 

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3 years ago
Which foodborne illness is best prevented by controlling time and temperature?
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While cooked rice meals are associated with the vomiting ailment, cooked veggies, animal products, and milk are frequently linked to the diarrhea ailment (rice pudding and fried rice). The easiest way to avoid it is to regulate the temperature and time.

<h3>What is meant by "foodborne disease"?</h3>

Foodborne illness is brought on by consuming contaminated foods or beverages. Foodborne infections can result from a wide variety of pathogens or disease-causing germs contaminating foods. Foodborne illnesses are typically caused by bacterial, viral, and parasite infections.

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<h3>What brings about food-borne illness?</h3>

Foodborne illness causes

Bacteria, viruses, and parasites are biological risks. Most foodborne infections are caused by bacteria and viruses. The greatest danger to food safety is posed by biological risks. They may be a result of improper handling (such as using excessive time or temperature) or inherent in the product.

To learn more about foodborne illnesses visit:

brainly.com/question/24477516

#SPJ4

4 0
1 year ago
Second-order neurons of ascending pathways that contribute to sensory perception terminate in the ________. Second-order neurons
madam [21]

Answer:

The correct answer will be option-Thalamus

Explanation:

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Thus, the thalamus is the correct answer.

7 0
3 years ago
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