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Biology 13 Online
OpenStudy (ryuga):

help

OpenStudy (ryuga):

Which statement best describes the difference between a gene and an allele? A. A section of a chromosome that usually contains the code for a particular protein is an allele. A gene is one of two or more variations of an allele. B. A section of DNA that usually contains the code for a specific protein that determines a specific trait is an allele, while a gene is a section of an allele. C. A section of DNA that usually contains the code for a specific protein that determines a specific trait is a gene, while an allele is a section of a gene. D. A section of a chromosome that usually contains the code for a particular protein is a gene. An allele is one of two or more variations of a gene.

OpenStudy (abhisar):

What do you think?

OpenStudy (ryuga):

c

OpenStudy (ryuga):

i yook a gues

OpenStudy (ryuga):

A geneticist made a cross between plants with smooth seeds, each with a gene that consisted of the alleles SS, and plants with wrinkled seeds, each with a gene that consisted of the alleles ss. What will be the phenotype of the resulting F1 plants? The allele S is dominant to the allele s. A. All smooth seeds. B. 3/4 will have smooth seeds, 1/4 will have wrinkled seeds. C. One half smooth and one half wrinkled seeds. D. All wrinkled seeds.

OpenStudy (abhisar):

For the first question, C isn't the right answer. A gene is a section of chromosome which codes for a special character while alleles are different forms of that gene. For example, in a pea plant there is a gene for stem height and it has two alleles which we denote with T and t. The T allele codes for tallness and t for shortness/dwarfness. T allele is dominant over t.

OpenStudy (abhisar):

For the second question, as rushwr stated yes, every plant will have smooth seed as S is dominant over s. But note that each of the plant will be heterozygous (Ss) Also note, S and s are same genes (gene for seed coat) but are different alleles of same gene.

OpenStudy (abhisar):

Yes, but allele is not a section of gene so option C is incorrect.

OpenStudy (abhisar):

Chromosome > DNA > Gene

OpenStudy (abhisar):

A is any how wrong cz gene is not different types of allele. It's other way around.

OpenStudy (abhisar):

See option D

OpenStudy (abhisar):

How D seems wrong to you?

OpenStudy (abhisar):

ANything part of DNA will automatically be part of chromosome.

OpenStudy (abhisar):

Because DNA itself is part of chromosome. Chromosome > DNA > Gene

OpenStudy (abhisar):

The answer is given?

OpenStudy (abhisar):

D should be, according to me. The second part of each statement here is the deal c:

OpenStudy (abhisar):

Yes but the second part is incorrect while in option D both parts are correct.

OpenStudy (abhisar):

c:

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