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4 years ago

Klinefelter syndrome in humans leads to underdeveloped testes and sterility. this is caused by which chromosomal condition?

Biology

1 answer:

Anuta_ua [19.1K]4 years ago

4 0

Klinfelters syndrome is when there is an extra X chromosome in males.

So instead of the normal sex chromosomes for males (XY), a male with klinefelters syndrome will have XXY.

I have included a pic of the karyotype to give you a better idea of what I'm talking about.

Hope this helps! I'm happy to help with any other questions you might have :)

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Helppppppp plz thx........

8090 [49]

Answer:

1) aa- affected

2) Aa- unaffected carrier

3) aa- affected

4) aa- affected

5) Aa - unaffected carrier

6) Aa- unaffected carrier

7) aa- affected

8) aa- affected

9) Aa- unaffected carrier

10) aa- affected

11) Aa- unaffected carrier.

This trait is <em>recessive</em>.

The F1 generation has a 50/50 chance of having unaffected offspring.

Explanation:

1) Given

2) Some of the offspring have the trait, and they're not affected, so they have to be a carrier

3) The box is shaded in so they have to have the trait, which means they have to have the same gene pattern as the other affected person (#1)

4) They are also shaded in, so they have to have the trait

5) Since the parents either have the trait or are carriers, if they're not affected they have to be a carrier

6) Same reasoning as #5

7) This is shaded in, the box has to have the trait

8) Shaded in = has the trait/affected

9) Since the parents either have the trait or are carriers, if they're not affected they have to be a carrier

10) Shaded in = has the trait/affected

11) Since the parents either have the trait or are carriers, if they're not affected they have to be a carrier

Since the trait is displayed when the people have two lowercase letters (aa), and people can be unaffected and carriers, (Aa), this trait has to be recessive.

If you make a Punnett Square, you will see that half of the offspring can result in an Aa, while the other half can result in an aa, meaning there's a 50/50 chance of the offspring of the F1 (first) generation will have the trait.

5 0

3 years ago

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Which allele for human blood type is recessive?

sergij07 [2.7K]

Blood type doesn't fall into the category of dominant/recessive genes exactly; rather it combines this with the properties of incomplete dominance. Ignoring the Rh factor, there are 3 alleles for blood type, I^a,I^b, and i. You will be type A if you have I^a I^a or I^a i and type B if you have I^b I^b or I^b i. You can also get type AB by having the combination I^a I^b or be type O if you have i i. If you need to use dominant/recessive, you can say the A and B allele are dominant over the O allele and codominant with one another.

7 0

3 years ago

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Pls help

DochEvi [55]

Answer: Don't know sorry

Explanation:

4 0

3 years ago

A single strand of DNA helix consists of 100 nitrogenous base pairs. On one strand, 36 of the bases are adenine and 24 are cytos

yawa3891 [41]

36 thymine (matches with 36 adenine)
24 guanine (matches with 24 cytosine)

6 0

3 years ago

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CORRECT ANDSWER GETS BRAINLIST

marusya05 [52]

Answer:

A) Power plant

Explanation:

The key to understanding this question, is first knowing what "stationary" means. When something is stationary, it doesn't move, it just stays in one place.

Since power plants are buildings, they naturally don't move. On the other hand, the other choices are all vehicles that are intended to move. So while all of these options do cause air pollution, the power plant is the only one that is stationary.

I hope this answer helps you :)

4 0

2 years ago

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