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3 years ago

Which of the following statements is true of homologous chromosomes?

Biology

2 answers:

gtnhenbr [62]3 years ago

5 0

The answer is B, they contain the same genes

uysha [10]3 years ago

3 0

The answer is:
B. The contain the same genes
Hope this Helps :-)

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Which of the following is NOT a difference between RNA and DNA molecules? *

galben [10]

Answer: its b

Explanation:

7 0

3 years ago

Red–green color blindness is a human X-linked recessive disorder. The normal allele (XB) is dominant to the mutant allele (Xb).

Cerrena [4.2K]

Answer:

Explanation:

Turner Syndrom individuals have an aneuploidy (Cells with abnormal chromosome numbers), their sex cells only have one X chromosome.

Paternal genetic apportation is, in this case, XB (Because Tom has normal vison), Jill genotipic is XBXb (Color Blindness is recessive, Xb is not expressed on her fenotipic because the dominant XB make her has normal vision).

Tom only has sperm carrying XB chromosomes because he has normal vision.

Jill Ovules are XB or Xb, She has both alleles.

An Jill's ovule carring the Xb mutante allele is fertilized by sperm lacking sex chromosomes. As a result their Daughter is born withTurner Syndrom and Color Blindness.

This sperm lacking sex chromosomes is the result of a Paternal nondisjunction of sex chromosomes during meiosis

"Bonus"

As color blindness is a X-linked recessive disorder, this case is one of the fewer scenarios when Jim and Tom can have a Daughter with Color Blindness. In a normal case their outspring has these possibilities of having Colorblindness...

Genetic Cross

Jill x Tom

(XBXb x XBY0)

Genotipic Fenotipic

XBXB 25% Females with normal vision

XBXb 25% Females with normal vision

XBY0 25% Males with normal vision

XbY0 25% Males with Color Blindness

75% of their children will have normal vision

100% of females will have normal vision

50% of males will have normal vision

Only males, 50% of them, will have Color Blindness.

8 0

3 years ago

Not For bàd purpose

katovenus [111]

Uhhh cool? I guess ?

3 0

2 years ago

Read 2 more answers

1) Which of the following explains why a bone in a bird's wing is homologous to a bone in a lizards leg? A) The bones in the two

dangina [55]

Answer:

The correct option is D) The two species have a common ancestor

Explanation:

In evolutionary studies, homologous structures can be described as structures which are similar in organisms of different species because they had a common ancestor in the past. These structures may not perform the same function but are similar because they arose from a common ancestor. Hence, the bone in a bird's wing can be homologous to a bone in a lizard leg because they have a common ancestor in the past.

5 0

3 years ago

Read 2 more answers

Hemophilia is a hereditary bleeding disorder that primarily affects males. Why does this condition typically affect males more t

Ymorist [56]

Answer:

See the answer below

Explanation:

Hemophilia typically affects more males than females because the disorder is X-linked and recessive.

Females have two X chromosomes (XX) while males only have one X and one Y chromosome (XY). The two X chromosomes in females are capable of carrying alleles while the Y chromosome in males is hypothesized not able to carry alleles.

Consequently, the two X chromosomes in females will both need to carry the recessive allele of hemophilia in order for any female to be affected for hemophilia while the males only need their single X chromosome to carry the recessive allele in order to be affected.

In order words, the presence of a single recessive allele is not enough for a female to be affected while it is more than enough for a male to be affected. Hence, more males are affected b hemophilia disorder than females.

6 0

3 years ago

Read 2 more answers