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Anna35 [415]
3 years ago
14

Where are your genes found?

Biology
2 answers:
CaHeK987 [17]3 years ago
5 0
1.) A persons genes are found in their chromosomes. The correct answer is D, your chromosomes. The correct answer is D.

2.) The shape of DNA is called a double helix. The strands run opposite each other and twist together. The correct answer is B. 

3.) The relationship between a chromosome and DNA is that chromosomes are made of DNA. The correct answer is A. 

4.) One thing that parents pass on to their offspring is genes. For example, hair color, eye color, skin color. The correct answer is A. 
sergey [27]3 years ago
3 0

Answer: 1) The correct option is D. Your Chromosomes. Genes are the segments of DNA that are present on the chromosomes and correspond to specific trait of the organism ( like genes for eye color).

2) The correct option is B) Double helix. DNA ( deoxyribonucleic acid) is the genetic material of the living organisms. It is made up of two strands of nucleotides, which are complementary to each other and give a shape of double helical structure.

3) The correct option is A) Chromosomes are made of DNA. Chromosomes are the thread like structures, which are made up of DNA. These structures possess essential information of the organism in the form of genes that are found on them.

4) The correct option is A) Genes. Genes are the segments of DNA that code fro a specific protein, which corresponds to a particular trait of the organism. They are passed from parents to their offsprings. Therefore, specific traits ( like eye color) are inherited by the offsprings from their parents.

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Question in English:

A female carries a recessive lethal gene (l) on one of her X chromosomes, and a normal dominant allele (L) on the other. What is the sex ratio to be expected in this woman's dependency if she marries a normal man?

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Females have two X chromosomes (XX) and males have an X and a Y chromosome (XY).

The genotype of the female is XLXl. The genotype of the male is XLY, since he is normal.

The possible genotypes are:

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<u>XL</u>                     <em>XLXL             XLXl</em>

<u>Y</u>                       <em>XLY               </em><em>XlY</em>

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All female offspring will be normal as they will always have one normal copy of the X chromosome from their father.

50% of the male offspring will be normal, but 50% will inherit the lethal gene from their mother.

Because the allele is lethal, that means XlY males will not be born.

That means 2/3 of the children will be females, and 1/3 will be males.

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