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4 years ago

Down syndrome, the most common genetic condition in the United States, is also called trisomy 21. What does this mean?

Biology

2 answers:

Setler79 [48]4 years ago

8 0

<u>Answer:</u>

The correct answer option is C. A person with Down syndrome has three copies of chromosome 21 instead of two copies. An extra chromosome 21 was present in either the sperm or the egg cell.

<u>Explanation:</u>

Down Syndrome is the most genetic condition in the United States caused by the error in the cell division called 'disjunction'.

A normal person has two copies of chromosome 21 while a person with down syndrome has three copies of it in either the sperm or the egg which fails to separate.

77julia77 [94]4 years ago

4 0

Trisomy=3 chromosomes; 1 more than the required pair (2)

21=the type of chromosome

So, here we can eliminate A and B.

Now we have C and D.

I know that when sperm cell(s) simultaneously fertilize [an] egg, a class of identical twins will form. Therefore, we can eliminate D, leaving us with merely C. Henceforth, C is your final answer.

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3 years ago

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3 years ago

which statement correctly compares and contrast the three stages of cellluar respiration that occurs in the presence of oxygen

Lapatulllka [165]

<h2><u>Full Question:</u></h2>

Which statement correctly compares and contrasts the three stages of cellular respiration that occur in the presence of oxygen? Each stage occurs in the mitochondria, but only the final stage produces ATP. Each stage produces ATP, but only the third stage occurs in the mitochondria. Each stage produces ATP, but only the first stage occurs in the cytoplasm. Each stage occurs in the cytoplasm, but only the final stage produces ATP.

<h2><u>Answer</u>:</h2>

Each stage produces ATP, but only the first stage occurs in the cytoplasm.

<h3><u>Explanation</u>:</h3>

Cellular respiration is the process by which the glucose or any respiratory substrate is burned down inside a cell producing ATP or energy. This process of cellular respiration is seen in each and every living cell. The glucose is burned in the cytoplasm of the cell producing the pyruvate. This pyruvate is decarboxylated into Acetyl CoA and transferred inside the mitochondria. So the glycolysis or the 1st step of cellular respiration occurs in cytoplasm and rest inside the mitochondria.

ATP is produced from each astep of cellular respiration. So the correct option is option C.

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3 years ago

In a forest with mice eat fruit from plants in barn owls eat with mice in this foodchain what are the plants that produce fruit

Finger [1]

I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

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3 years ago

PLEASE HELP FAST

Mars2501 [29]

Answer:

A) sugar

C) starches

Explanation:

Sugar is produced in the form of glucose

Glucose is used to make cellulose fibers, the structural component of the plant, or is stored in the form of <em>starch</em> granules

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3 years ago