1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Snezhnost [94]
3 years ago
11

Why is having an extra chromosome 21 tolerable to the point that someone with this condition can survive to maturity?

Biology
1 answer:
Vilka [71]3 years ago
6 0
I think that having an extra chromosome 21 is tolerable to the point that someone with this condition can survive to maturity because it does not replicate.

There should only be a pair of chromosome 21. In the event that there are 3 chromosome 21, the person that has this extra chromosome has Down syndrome. Changes in the number and structure of this chromosome may result to delayed development, intellectual disability, but not immediate death.
You might be interested in
Helium has an atomic number of 2. Is the model of the helium atom above is
77julia77 [94]

Answer:

Yes, the model of the helium atom is showing an ion.

Explanation:

Helium, with an atomic number of 2, should have 2 protons and 2 electrons; however, the model only depicts 1 electron. That means the helium must have lost an electron, making it a +1 charge and an ion.

4 0
3 years ago
What are 3 structures are found in every living cells?
stepan [7]

Answer:

Golgi apperatures

Mitochondria

Smooth and Rough ER.

7 0
3 years ago
Bruce has a genetic disorder. bruce and his wife, kim, have three children, one of which has the genetic disorder. how is this d
laiz [17]
This would be a recessive disease.

Father is dd
Mother is Dd (has to be because one child has the disease)

Parents cross is dd x Dd which gives rise to Dd (0.5) and dd (0.5). Each time they have a child they have a 50% chance of the child having the disease. In their case, only one of their 3 children is dd. The others though are carriers!
5 0
2 years ago
3/10
tresset_1 [31]

Answer: It's known as the continental drift :)

Explanation: "Pangea's existence was first proposed in 1912 by German meteorologist Alfred Wegener as a part of his theory of continental drift. Its name is derived from the Greek pangaia, meaning “all the Earth.”" (copied from google)

3 0
3 years ago
A scientist is studying a plant species in which the flower color genes are codominant the scientist crosses a plant with red fl
strojnjashka [21]
In co dominance, both alleles show. Thus, the filial, F1, generation, will most likely be white with red spots/speckles. See image below.

6 0
3 years ago
Other questions:
  • The image shows sedimentary rock layers with index fossils and a fault.
    13·2 answers
  • Do prokaryotes have enzymes or chloroplasts?
    15·1 answer
  • What term is used to describe the reuse of aluminum in old soda cans to make new products
    11·2 answers
  • Summarize dnas importance to you​
    10·1 answer
  • Hospital patients are often given intravenous fluids (IVs) to maintain proper levels of water and salts in the
    11·2 answers
  • Kim learns how rocks can change from one type into another over a long period of time. She knows that a rock that undergoes extr
    10·1 answer
  • Every one person has how many different types of genes
    14·1 answer
  • In humans, brown eyes are generally dominant over blue eyes. Find the phenotypic and genotypic ratios of a cross between two het
    11·2 answers
  • What is transported across a membrane during osmosis.
    11·1 answer
  • A softball pitcher throws a 0.17 kg ball toward a batter who is 20 m away. The
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!