Chromosomal theory?

Aliya1

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5 years ago Edited: 5 years ago, Aliya1

Hi there, this is a new assignment that I have just begun today
#1.Which of the following statements correctly describes the Chromosomal Theory of Inheritance?
a). The factors that determine our traits are found on chromosomes.
b). Each person has two copies of the factors that determine our traits.
c). Homologous chromosomes separate independently during meiosis.
d). X and Y chromosomes determine whether an individual is genetically male or female.
Is this not a??
Chromosomal theory: is a theory that chromosomes are stings of genes and each gene has a specific location on a specific chromosome.

Post Merge: 5 years ago

For question #1, I think it's a based on the definition of a chromosomal theory
#2. Which of the following is NOT true of Y-linked traits?
Select one:
a. They are always expressed.
b. They carry both dominant and recessive alleles of a trait.
c. They are extremely uncommon in females.
d. They are passed from father to son.
i know that c,d and b are correct so a is the answer they're looking for in #2 right?
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bio_man

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Aliya1 Author

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5 years ago

#5. Marfan syndrome is an autosomal dominant disorder caused by mutations in the FBN1 gene. It affects connective tissues, commonly resulting in long bones, abnormal curvature of the spine, defects in the eye (glaucoma), and faulty heart valves.X-linked hypophosphatemia is an X-linked dominant disorder that causes a type of rickets. Which of the following rows describes the inheritance pattern of these disorders? a). Marfan Syndrome( Affected males can only pass on the trait to their daughters. ) X-linked Hypophosphatemia( Males and females are affected with equal frequently.) b). Marfan Syndrome(Males are affected more frequently than females.) X-linked Hypophosphatemia(Female carriers can pass on the trait to their sons.) c). Marfan Syndrome(Female carriers can pass on the trait to their sons.) X-linked( Males are affected more frequently than females.) d).Marfan Syndrome (Males and females are affected with equal frequency.) -linked Hypophosphatemia(Affected males can only pass on the trait to their daughters.)
is this b?
#6. Red-green colour blindness is a sex-linked trait. Red-green colour blindness (Xrg) is the inability to distinguish between red and green colours. The Xrg allele is recessive to the normal X allele.
A normal woman has a father who has red-green colour blindness. She had a child with a man who does not have red-green colour blindness. What is the probability they will have a son with red-green colour blindness?Select one:a). 0.13.b). 0.c). 0.50.d). 0.25. is this d?

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bio_man

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5 years ago

https://biology-forums.com/index.php?topic=1815551 Answered here.

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