where did the extra chromosome in down syndrome come from?​

Answers

Answer 1
Down syndrome results when abnormal cell division involving chromosome 21 occurs. These cell division abnormalities result in an extra partial or full chromosome 21.

Related Questions

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Which of the following does not occur in an aquatic ecosystem as a result of nutrient loading?
a. acidification of the water
b. algae growth as a result of eutrophication
c. degraded quality of water for human and livestock consumption
d. improved water habitats for human recreation

Answers

improved water habitats for human recreation.

is this true or false, Surface waves result from a combination of up-and-down plus side-to-side motion.

Answers

Answer:

yaaa you knew that air is everywhere it moves

Which process does not release energy?


a photosynthesis

b lactic acid fermentation

c cell respiration

d alcoholic fermentation

Answers

Your answer is a hope this help

help me pleaseeeeeeee

Answers

Answer:

The S stage (DNA sythesis)

Explanation:

During the S stage the cell synthesisis a new copy of DNA in the nucleus in preparation for cell devision.

yes the answer is The s stage

Biologyyyy agaaainn!

Answers

Answer:

1 and 2

Explanation:

This is my answer to your question

i don’t know how to do the chart

Answers

Answer:

??????

Explanation:

How many membrane layers cover the nucleus?

Answers

Answer:

2 membrane layers cover up the nucleus

Answer:

two lipid bilayer

Explanation:

the nucleus membrane is made up of two lipid bilayer

what is one common example of a double replacement reaction??????

Answers

The reaction:

AgNO3 + NaCl → AgCl + NaNO3

is a double replacement reaction. The silver traded its nitrite ion for the sodium's chloride ion.

Another example is the reaction between sodium sulfide and hydrochloric acid to form sodium chloride and hydrogen sulfide:

Na2S + HCl → NaCl + H2S

3 These diagrams show where seeds from two different
plants were found

A. Which plant uses the wind to spread its seeds?
B. Which plant's seeds are most likely to be spread
by animals? .....​

Answers

Answer:

A: plant A

B: plant B

hope it helps you

Autotrophs are called_________because they produce all the food that________use

Answers

1. Producers
2. Herbivores?

What happens What happens during cytokinesis? /ring cytokinesis?

Answers

Cytokinesis performs an essential process to separate the cell in half and ensure that one nucleus ends up in each daughter cell. ... The contractile ring shrinks at the equator of the cell, pinching the plasma membrane inward, and forming what is called a cleavage furrow.

A researcher, studying dolphins in the wild, made the following sketch. Each dot on the map represents one dolphin. The area surveyed by the scientist was 1 km2. Based on the researcher’s data, how many dolphins would you estimate to be in a 3 km2 area?
A. 3
B. 7
C. 14
D. 21

Answers

The answer is 21. Just do 3•7 and you get 21.
It’s D)21 (3x7=21)

(did the assignment)

Fastttttttttttttttttttttttttttt I will give branliest

Answers

Answer:

ok

Explanation:

Answer:

A. Both of them are correct

Explanation:

Mechanical waves include the movement of water, from ripples in a puddle to giant rolling waves on the surface of the open ocean. For example, water waves (mechanical waves) can transfer energy across an entire ocean basin, even though individual water molecules do not travel great distances.

Electromagnetic propagation through water is very different from propagation through the air because of water's high permittivity and electrical conductivity. Plane-wave attenuation is high compared to air and increases rapidly with frequency.

All the services that people use
and receive when they are away
from home are known as
A transportation.
B hospitality
C tourism.
D travel.

Answers

The answer would be A.
Hope this helps have a great day

All the services that people use and receive when they are away from home are known as - option B. hospitality.

Hospitality is a term associated with the providing best care and services to their guests and anticipating their needs. The service includes various acts such as welcoming, receiving, hosting, or entertaining guests.  

The key components of hospitality are:

ConsiderationHumilityThoughtfulGratefulEmpathyPoised

In hospitality guest or traveler who is away from home receives and use, services are given by their host.

Thus, the correct answer is - B. hospitality.

Learn more about hospitality:

https://brainly.com/question/9283461

Glucose can be classified as both of the following terms

Answers

Answer:

hope this helps :)

Explanation:

Monosaccharides contain a single unit; disaccharides contain two sugar units; and polysaccharides contain many sugar units as in polymers - most contain glucose as the monosaccharide unit. Number of Carbons: Monosaccharides can be further classified by the number of carbons present.

How could you stop a mixture of sugar, water, and yeast fermenting?​

Answers

Keep it in an aerobic environment, meaning that there should be oxygen present. Fermentation is anaerobic, hence aerobic conditions will prevent fermentation from occurring.

P=
MULTIPLE CHOICE QUESTION
Pick all the correct answers
unsaturated fatty acids have the maximum
amount of hydrogens
unsaturated fatty acids have double bonds
saturated fatty acids have double bonds
Trans fats are the healthiest fats to eat
because they are the only ones found in
nature
saturated fatty acids have the maximum
amount of hydrogens
Trans fats are the worst fats to eat because
they are not found in nature

Answers

Answer: These are all of the correct answers

Unsaturated fatty acids have double bonds.Saturated fatty acids have the maximum amount of hydrogensTrans fats are the worst fats to eat because they are not found in nature.

Explanation:

What is the name of the CI vertebra?

Answers

Answer:

The name is Atlas.

Answer: atlas

Explanation:

The C1 vertebrae is known as the atlas

Which example illustrates adhesion?
O water droplets sticking to a window
O water forming a large drop
O water evaporating from a leaf
O water falling from the sky

Answers

Answer:

The answer is Water droplets sticking to a window.

What are the pros and cons of Gene Therapy?

Answers

Pros of gene therapy -
1.Gene therapy is a source of hope
2.The effects of therapy are long lasting and timeless
3. Gene therapy can eradicate disease and improve the quality of life

The cons of gene therapy
1. There is no guarantee and it can go wrong
2. Gene therapy is a costly treatment option
3. There is a potential for developing resistance
4. Ethical concerns

What is deoxyribose?
A. n acid found in DNA
B. a sugar in DNA
C. a pigment found in RNA
D. a nitrogenous base found in DNA and RNA

Answers

That’s easy it’s just B

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Which of the following does not occur in an aquatic ecosystem as a result of nutrient loading?
a. acidification of the water
b. algae growth as a result of eutrophication
c. degraded quality of water for human and livestock consumption
d. improved water habitats for human recreation

Answers

Answer:

Answer D

Explanation:

improved water habitats for human recreation

D. Hope this helps :)

How many of their boys also have dimples?

Answers

Answer:

it's genetic

Explanation:

Baby cheeks are so sweet, pudgy, and pinchable. Pair those with adorable dimples and giggles and you have a baby akin to a kewpie doll.

Dimples are often seen as a desirable characteristic because they light up a face, even through smudged, terrible-two tears. They definitely seem to provide a little more personality!

But how do you know if your baby will have dimples? It’s a question that many soon-to-be parents ask themselves. The answer lies within miniscule, curly things called genes.

Plate boundaries where plates move toward each other are called
transform boundaries.
convergent boundaries.
divergent boundaries.

Answers

convergent boundaries :)

Calcium and phosphate are important parts of the bone matrix because they:

A provide flexibility to bone.

B promote the formation of cartilage.

C provide strength and durability to bone.

D produce blood cells in the bone marrow.

Answers

Answer: it’s c

Explanation:

Answer: provide strength and durability to bone.

Explanation:

PLEASE HELP IT IS DUE TODAY!

Answers

Answer:

niceee

Explanation:

Answer:

IT'S A OR C

Explanation:

im pretty sure its c though because those are chromosomes for a human

____ is i five carbon sugar found in dna

Answers

Answer:

deoxyribose

Explanation:

The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose.

1.
How does water behave when it freezes?

Answers

Answer:

During freezing, water molecules lose energy and do not vibrate or move around as vigorously. This allows more stable hydrogen-bonds to form between water molecules, as there is less energy to break the bonds...Thus water expands as it freezes, and ice floats atop water.

Explanation:

what would happen if all countries in the world depended only on wind power?

Answers

Answer:

A country getting all its electricity from a combination of wind, solar ... Not only does that make vitamin D a commodity, it also means solar ... Elon Musk became a sensation in South Australia last year after he decided Tesla would build the world's biggest lithium-ion battery ... This didn't happen overnight.

A forensic scientist is often called upon to testify about...
A.a suspect's moral character
B.physical evidence related to a crime
C.the reliability of witness testimony
D.the past history of the suspect

Answers

I think A. A suspect......

Answer: B

Explanation:

Forensic scientists are the ones who are gathering the details of the scene a building evidence for the case.

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