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Harlamova29_29 [7]
4 years ago
8

There are two main types of chromosomal disorders, those that take place on the 21st pair of chromosomes and those that ________

______.
Biology
1 answer:
vampirchik [111]4 years ago
7 0

Down syndrome and Alzheimer's disease.

Down syndrome is a chromosomal disorder which is caused by the presence of extra copy of chromosome  21. Therefore also called as Trisomy 21.

Alzheimer's disease is a most common form of dementia(reduction in brain functioning). It is caused by mutation in single gene APP (Amyloid Precursor Protein) present on chromosomer 21.

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1. Explain how a doctor might use a pedigree to understand whether a person's disease has a genetic link.
Whitepunk [10]

Answer no 1:

A pedigree can be described as a chart or a diagram which illustrates the patterns of inheritance among generations of a family. Family history is very important to know the genetic history of a disease and how it runs in a family. A pedigree will let know that what are the probabilities of a disease to occur in the offsprings based on the genetic history.

Answer no 2:

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3 years ago
Accoriding to the cell theory which best describes cells​
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Living organisms are not created spontaneously.

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The cell theory was formulated around the 17th century and there are some of its postulates:

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Learn more:

Cell theory brainly.com/question/3256177

#learnwithBrainly

8 0
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If you could freeze time at any instant and examine a snapshot of cells in a
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