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
Lyrx [107]
3 years ago
10

A person is born with an extra copy of chromosome 21, what type of mutation has occurred?

Biology
2 answers:
Shalnov [3]3 years ago
7 0
The answer is A, DNA mutation. :) 
Hope this helps! 
guapka [62]3 years ago
5 0
Hold on. Failure of chromosomes copying is known as non-disjunction. This mutation is known as trisomy 21, or Down’s syndrome. I believe the answer is D.
You might be interested in
Is this correct pls help it’s timed ;( xD
aleksley [76]
Truee;)) hope it helps
5 0
4 years ago
Hershey and Chase used radioactive isotopes to label different parts of the phage. They grew one batch of phage in the presence
AlekseyPX

The sulphur would lable the capsule and the phosphorous the nucleic acid.

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

Hershey and Chase experiment included growing of the pages in two batches, one in presence of 35S and other in presence of 32P. They then infected bacterial cells with these phages, cleaned them and then centrifuge the cells to isolate the marked elements in bacterial cells.

This was done to isolate which part of the phage is actually infective. Sulphur being a part of the proteins will mark the capsule whereas DNA having the phosphate bridges will be marked by 32P.

5 0
3 years ago
How are the genotypes and phenotypes of parents related to the genotypes and phenotypes of offspring (how are the offspring like
lozanna [386]

Mendel observed that a heterozygote offspring can show the same phenotype as the parent homozygote, so he concluded that there were some traits that dominated over other inherited traits. However, the relationship of genotype to phenotype is rarely as simple as the dominant and recessive patterns described by Mendel.

3 0
3 years ago
Read 2 more answers
Conteste los siguientes enunciados, registrando (F) si es falso y (V) si es verdadero. 1. ( ) Una mujer portadora de hemofilia,
Ksenya-84 [330]

Answer:

1. Verdadero

2. Falso

3. Falso  

4. Falso

5. Verdadero

Explanation:

Los seres humanos, como así también la mayoría de los mamíferos, poseen dos cromosomas sexuales: un cromosoma X y un cromosoma Y. Las hembras poseen 2 cromosomas X (un cromosoma X es heredado de la madre y el otro cromosoma X es heredado del padre); mientras que los hombres tienen un cromosoma X y un cromosoma Y (el cromosoma X es heredado de la madre, mientras que el cromosoma Y es heredado del padre). La hemofilia es una enfermedad recesiva monogénica ligada al cromosoma X, la cual está caracterizada por cuadros hemorrágicos causados por el déficit parcial y/o total de factores de coagulación. Los hombres expresan el fenotipo recesivo con mayor frecuencia que las mujeres para aquellos genes que se encuentran en el cromosoma X y poseen un mecanismo de herencia recesivo, esto debido a que los hombres sólo poseen una copia del alelo ligado al X (lo que hace que el alelo recesivo se exprese con mayor frecuencia en el fenotipo). De este modo, los hombres manifiestan hemofilia con mayor frecuencia que las mujeres porque en mujeres el gen recesivo necesita la presencia de dos copias del alelo defectuoso recesivo para que se exprese en el fenotipo hemofílico (es decir, las mujeres heterocigotas son portadoras de un alelo defectuoso pero no expresan la condición en el fenotipo), mientras que en los hombres la presencia de un sólo alelo defectuoso localizado en su único cromosoma X es suficiente para la expresión del fenotipo recesivo. En hombres, los genes ligados al cromosoma X son siempre heredados de la madre (los hombres heredan del padre el cromosoma Y). Finalmente, la herencia de caracteres ligados al cromosoma Y es muy rara porque los genes localizados en la región diferencial del cromosoma Y son escasos y estos genes solamente pueden ser trasmitidos de padres a hijos varones (ya que se encuentran en el cromosoma Y).

6 0
3 years ago
What is the purpose of the part of the female reproductive system highlighted below
bearhunter [10]

Explanation:

Answer

c

4 0
4 years ago
Other questions:
  • Which evidence originally supported Hess’s idea of seafloor spreading in 1968
    10·2 answers
  • A friend declares that chromosomes are held at the metaphase plate by microtubules that push on each chromosome from opposite si
    10·1 answer
  • You are scientists! You've been studying dna. You already know that part of the structure of DNA is 4 bases - adenine (A), guani
    6·1 answer
  • What is the relationship between the food we eat and energy in the body
    10·2 answers
  • Describle the route taken by blood from the intestine to the kidney
    13·1 answer
  • The graph shows the populations of wolves and mountain lions in five different counties in Montana. Wolves and mountain lions co
    15·2 answers
  • What is primary succession
    11·2 answers
  • Which event takes place first during<br> DNA replication
    5·1 answer
  • Hahahahhahhhzha shshhshs
    13·1 answer
  • Which of the following is true about protein molecules?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!