Question

question 22 of 26

which statement describes the role of chromosomes in inheritance?

a. they are carried only in sperm cells and code only for sex-linked traits.
b. they carry alleles from each parent, which determine traits.
c. they carry characteristics that are determined by phenotypes.
d. they are involved in passing down only recessive traits.

Explanation:

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<reasoning>

Analyze the role of chromosomes in inheritance

Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). In sexual reproduction, offspring inherit chromosomes from both parents. This process is fundamental to Chromosome Structure and genetic transmission.

Evaluate the given options

• Option A: "They are carried only in sperm cells and code only for sex-linked traits." This is incorrect because chromosomes are carried in both sperm and egg cells (gametes), and they code for all heritable traits, not just sex-linked ones.
• Option B: "They carry alleles from each parent, which determine traits." This is correct. Chromosomes carry genes, and the alternative forms of these genes are called alleles. Offspring inherit one set of chromosomes from each parent, bringing together alleles that determine their genetic makeup (Genotype).
• Option C: "They carry characteristics that are determined by phenotypes." This is incorrect because chromosomes carry the genetic material (genotype) that determines the physical characteristics (Phenotype), not the other way around.
• Option D: "They are involved in passing down only recessive traits." This is incorrect because chromosomes carry alleles for both dominant and recessive traits.

</reasoning>

<answer>
<mcq-option>A. They are carried only in sperm cells and code only for sex-linked traits.</mcq-option>
<mcq-correct>B. They carry alleles from each parent, which determine traits.</mcq-correct>
<mcq-option>C. They carry characteristics that are determined by phenotypes.</mcq-option>
<mcq-option>D. They are involved in passing down only recessive traits.</mcq-option>
</answer>

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Answer:

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<reasoning>

Analyze the role of chromosomes in inheritance

Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). In sexual reproduction, offspring inherit chromosomes from both parents. This process is fundamental to Chromosome Structure and genetic transmission.

Evaluate the given options

• Option A: "They are carried only in sperm cells and code only for sex-linked traits." This is incorrect because chromosomes are carried in both sperm and egg cells (gametes), and they code for all heritable traits, not just sex-linked ones.
• Option B: "They carry alleles from each parent, which determine traits." This is correct. Chromosomes carry genes, and the alternative forms of these genes are called alleles. Offspring inherit one set of chromosomes from each parent, bringing together alleles that determine their genetic makeup (Genotype).
• Option C: "They carry characteristics that are determined by phenotypes." This is incorrect because chromosomes carry the genetic material (genotype) that determines the physical characteristics (Phenotype), not the other way around.
• Option D: "They are involved in passing down only recessive traits." This is incorrect because chromosomes carry alleles for both dominant and recessive traits.

</reasoning>

<answer>
<mcq-option>A. They are carried only in sperm cells and code only for sex-linked traits.</mcq-option>
<mcq-correct>B. They carry alleles from each parent, which determine traits.</mcq-correct>
<mcq-option>C. They carry characteristics that are determined by phenotypes.</mcq-option>
<mcq-option>D. They are involved in passing down only recessive traits.</mcq-option>
</answer>

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