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
valentinak56 [21]
3 years ago
13

Cystic fibrosis is a recessive genetic disorder caused by a mutation of the CTRF gene. The disease is characterized by excessive

mucus production along the respiratory and digestive tracts in addition to other symptoms. Cystic fibrosis is a progressive disorder that is most associated with chronic respiratory disease.
Sara and Anthony found out that they are both carriers of the disorder, but neither have the disease. What are the chances their child will be born with cystic fibrosis?
A.
0:4
B.
1:2
C.
4:4
D.
1:4
Biology
1 answer:
tekilochka [14]3 years ago
8 0

Answer:

Since both Anthony and Sara are healthy carriers of the gene that causes cystic fibrosis, the chance of having a child with this disease are 1:4 (option D).

Explanation:

The inheritance pattern of cystic fibrosis is autosomal recessive, and considering that both parents carry the abnormal CFTR gene, it can be said that the parental genotypes are:

<em>Anthony N/Qf </em>

<em>Sara N/Qf </em>

Where N is the normal gene and Qf is the abnormal gene.

Since this is an autosomal recessive disorder, only the homozygosity of the defective allele will cause the disease to manifest :

N/Qf X N/Qf

<em>Alleles     N       Qf </em>

<em>N            N/N    N/Qf </em>

<em>Qf           N/Qf  Qf/Qf </em>

  • The chances of having a healthy child are 25%.
  • The chances of having a carrier child are 50%.
  • The chances of having a child with cystic fibrosis are 25%.

Therefore, the chance of Anthony and Sara having a child with cystic fibrosis is 1:4.

Learn more:

Cystic fibrosis inheritance brainly.com/question/6584627

You might be interested in
Imagine that you are the scientist who discovered cells. If you were to give a speech to a group of fellow scientists, what key
jolli1 [7]
<span>The key points about cell theory are as follows:
1. All living organisms are made up of cells; the organisms may be unicellular or multi cellular.
2. The cell is the basic unit of life.
3. New cells are derived from pre-existing cells.
4. All cells maintain homeostasis.
Some new facts have been added to these basic facts; the new facts added include the following:
(A). Energy flow occur withing all living cells.
(B). Hereditary information derived from DNA is passed from cell to cell.
(C).  All living cells are made up of the same basic chemical compositions.</span>
5 0
3 years ago
Read 2 more answers
Are ants a producer, an herbivore, a carnivore, a scavenger, or a decomposer?
swat32

An ant is considered a scavenger!!

Hope this helps!

6 0
3 years ago
Which characteristics must an object possess in order to be considered alive?
Viktor [21]
Characteristics of Living Creatures

1. Move
2. Eat
3. Sensitive to Stimuli
4. Breathe
5. Grow
6. Dispose of Waste
7. Reproduction
8. Adapt
7 0
3 years ago
In eukaryotes, the size of the primary transcript is generally ________ the gene in the template dna strand.
Hunter-Best [27]
Had to look for the options and here is my answer. 
Basically, when we say eukaryotes, these are kinds of organisms which consists of cells that has DNA and other organelles that are enclosed by a membrane. In this case, the size of the primary transcript is generally THE SAME LENGTH the gene in the template of the DNA strand. Hope this helps.
3 0
3 years ago
HELP ME I WILL GIVE BRAINIST AWANERR AND On a separate sheet of paper, choose three animals, one that lives in water, one that l
padilas [110]

Answer and Explanation:

Land - Lion

Water - Sealion

Flies - Bees

Lions have strong retractable jaws that help them eat their prey and that way they adapt to their enviroment.

The Sealion's thick, oily fur and a layer of blubber allow them to keep a high temperature in cold waters.  

A Bees body carries an electrostatic charge that attracts pollen and that way they can keep it in them.

Hope this Helps! Have a GREAT day!

4 0
3 years ago
Other questions:
  • The most appropriate lighting for a reptile enclosure ensures adequate ultraviolet-________ exposure.
    13·1 answer
  • What type of angle is formed by the baseball players leg ? Right, acute, obtuse, or straight
    11·2 answers
  • Science is a process for producing knowledge. All but one, describes why scientific knowledge is durable.
    9·1 answer
  • When oxygen is plentiful inside a skeletal muscle cell, what happens to the pyruvic acid that is formed during glycolysis?
    8·1 answer
  • What organelle handles packaging and shipping?
    9·1 answer
  • Didn’t know about this one
    6·1 answer
  • Which are protists that act like fungi ?
    5·2 answers
  • Describe how human male gametes differ from female gametes​
    11·2 answers
  • CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION I WILL MARK YOU BRAINLIEST THANK YOU
    9·2 answers
  • Which of the following is an example of genomic imprinting in humans? Which of the following is an example of genomic imprinting
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!