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Gnoma [55]
3 years ago
12

Through which material would sound travel the fastest?

Biology
2 answers:
dedylja [7]3 years ago
6 0

Answer:

A

Explanation:

jasenka [17]3 years ago
4 0
Sound travels fastest through solids and liquids more than it does in gases since the molecules are more tightly packed.

Thus the answer would most likely be C.Steel
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Duchenne muscular dystrophy is an X-linked recessive disease. A phenotypically normal couple wants to start a family. The woman’
Andreyy89

Answer:

\frac{1}{8}

Explanation:

From the question: Duchenne muscular dystrophy is an X-linked recessive disease.

Now for an X-linked recessive disorder to be affected by a male individual; it only requires the presence of only one copy of the recessive allele of the disease to be present BUT in a female individual. both copies of the recessive allele must be present.

Let the X-linked recessive disease(i.e Duchenne muscular dystrophy) be = (ⁿ)

However, we are told that the couples are normal and are unaffected. Therefore;

the male partner (XY) will be:   X^NY

the female partner (XY) will be: X^NX^N

Similarly, the question proceeds by telling us that: the woman's brother has the disease.

Definitely, it's possible that this unaffected woman is a carrier of the disease.

So, if she is a carrier; we have her traits to be: X^NX^n

NOW, if a cross exist between these couples; we have

X^NY     ×        X^NX^n

                     X^N                         Y

X^N                X^NX^N                  X^NY

X^n                 X^NX^n                   X^nY

So, we have offspring as follows:

X^NX^N  = normal unaffected female  

X^NY     = normal unaffected male

X^NX^n   = female carrier for the Duchenne muscular dystrophy disease

X^nY      = affected male with the Duchenne muscular dystrophy disease

So, the probability of the child to be affected with the disease = \frac{1}{4}

Also, the probability that the first child will be a male or a female = \frac{1}{2}

∴

the  probability that the couple’s first child will be affected = \frac{1}{4}*\frac{1}{2}

=\frac{1}{8}

4 0
3 years ago
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU B
alexandr1967 [171]

Answer:

A. They are ductile and malleable

Explanation:

Although they have luster/shine they can be be dissolved in water and in acid so it can not be all of the above. They are malleable so they can be easily be made into jewelry.

6 0
2 years ago
What is ment by solute, solvent and solution?
rosijanka [135]
Are you asking for the definitions?

6 0
3 years ago
What are three ways used to describe organisms such as humans
natima [27]

Answer:

heterotrophs, tertiary consumers and top carnivoresExplanation:i toke the test

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Mrs. Ever hart developed the theory that all bulldogs are great pets . After all her bulldog Meatball is a wonderful dog .... do
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That sounds like a statement because she has no scientific backing that ALL bulldogs are great pets and only has experience with one.
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