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
Mila [183]
3 years ago
8

Duchenne muscular dystrophy (DMD) is caused by a relatively rare X-linked recessive allele. An affected man mates with his unaff

ected first cousin; there is otherwise no history of DMD in this family. The mothers of this man and his mate were sisters. 13. Who passed on the disease allele to the affected man?A.GrandmotherB.GrandfatherC.Both grandparentsD.Either grandparent14. What is the probability that the couple’s first child will be affected? A.1/16B.1/8C.1/4D.1/2E.0
Biology
1 answer:
Citrus2011 [14]3 years ago
4 0

Answer:

A. Grandmother.  

B. 0

Explanation:

A. If there is no history of the disease in the family, there were only female unaffected genetic carriers. Duchenne muscular dystrophy is a recessive disease linked to the X chromosome, all man with the mutation will display the disease, since they have only one X chromosome (XY). Women have XX, so, if they inherit an abnormal dystrophin gene, but they have a normal allele on the other X chromosome, they won´t develop the muscular dystrophy.  

B. The problem does not state that the woman is a carrier, so, the probability of having a child affected is zero. The disease is linked to the X chromosome, so, sons will not be affected, and daughters would have a copy of the mutated gene, but will not display the symptoms.  

You might be interested in
For protection and support.<br> Invertebrates may have an<br> Vertebrates have a backbone and an
nadezda [96]

Answer:

Skeleton

Explanation:

Vertebrates have bones

5 0
2 years ago
Which structure connects each kidney to the bladder?<br> Ureter<br> Urethra
Maslowich

Answer:

Two ureters.

These narrow tubes carry urine from the kidneys to the bladder. Muscles in the ureter walls continually tighten and relax forcing urine downward, away from the kidneys. If urine backs up, or is allowed to stand still, a kidney infection can develop.

Explanation:

6 0
3 years ago
Use the options below to complete each sentence.
Alex787 [66]

Answer:

no its predation, competition, cooperation

Explanation:

i just did it

8 0
3 years ago
How can the NA help prevent UTI's
vesna_86 [32]
NA? What is that?
Maybe i can help
4 0
3 years ago
70 points <br> Hammerhead shark process of sexual reproduction?
AlladinOne [14]

Answer:

? explain better

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • based on the fact that people can get cancer regardless of their genetics, what are some things you can do to lower your risks o
    10·1 answer
  • Science cannot be used to answer questions of good or evil. true or false
    14·2 answers
  • Ariel drew a diagram to compare two human-induced environmental changes.
    9·2 answers
  • What characteristics distingueshes fungi from other organisms
    7·1 answer
  • A bone cell that absorbs and removes unwanted bone tissue is an:
    8·1 answer
  • Which characteristics must an object possess in order to be considered alive?​
    15·1 answer
  • Your science teacher has asked the class to make a cell city model. Which building or business in the city could represent the m
    11·1 answer
  • If the water concentration inside a cell is higher than the water concentration outside the cell, water flows out of the cell. T
    6·1 answer
  • PLEASE HELP WILL MAEK BRAINLIEST!!!!!!!!!!!!!!!!!
    8·1 answer
  • Explain why the overall charge on an atom is zero
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!