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Concept explainers
A.
To explain: The mechanism by which flies with two different eye colors for example ruby and white can give rise to progeny that have brick-red eyes.
Concept introduction: Genes are DNA sequences or RNA sequence which results in functional products which are RNA and protein respectively which has their own function inside the cell. Allele is the modification of the gene. Alleles are of two types dominant and recessive. The genes are named based on the mutation they cause. Since the gene results in a white eye, it’s called as white gene and thereby white allele which produce eye colors are the variants of the white gene. Null alleles are those that do not carry any functional allele.
B.
To explain: The mutations of the eye color which are from the same genes and from different genes.
Concept introduction: Genes are DNA sequences or RNA sequence which results in functional products which are RNA and protein respectively which has their own function inside the cell. Allele is the modification of the gene. Alleles are of two types dominant and recessive. The genes are named based on the mutation they cause. Since the gene results in a white eye, it’s called as white gene and thereby white allele which produce eye colors are the variants of the white gene. Null alleles are those that do not carry any functional allele.
C.
To explain: The mechanism by which different alleles of the same gene give different eye colors.
Concept introduction: Genes are DNA sequences or RNA sequence which results in functional products which are RNA and protein respectively which has their own function inside the cell. Allele is the modification of the gene. Alleles are of two types dominant and recessive. The genes are named based on the mutation they cause. Since the gene results in a white eye, it’s called as white gene and thereby white allele which produce eye colors are the variants of the white gene. Null alleles are those that do not carry any functional allele.
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Chapter 19 Solutions
Essential Cell Biology (Fourth Edition)
- What is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of thesearrow_forwardIdentify the indicated tissue? (stem x.s.) parenchyma collenchyma sclerenchyma ○ xylem ○ phloem none of thesearrow_forwardWhere did this structure originate from? (Salix branch root) epidermis cortex endodermis pericycle vascular cylinderarrow_forward
- Identify the indicated tissue. (Tilia stem x.s.) parenchyma collenchyma sclerenchyma xylem phloem none of thesearrow_forwardIdentify the indicated structure. (Cucurbita stem l.s.) pit lenticel stomate tendril none of thesearrow_forwardIdentify the specific cell? (Zebrina leaf peel) vessel element sieve element companion cell tracheid guard cell subsidiary cell none of thesearrow_forward
- What type of cells flank the opening on either side? (leaf x.s.) vessel elements sieve elements companion cells tracheids guard cells none of thesearrow_forwardWhat specific cell is indicated. (Cucurbita stem I.s.) vessel element sieve element O companion cell tracheid guard cell none of thesearrow_forwardWhat specific cell is indicated? (Aristolochia stem x.s.) vessel element sieve element ○ companion cell O O O O O tracheid O guard cell none of thesearrow_forward
- Identify the tissue. parenchyma collenchyma sclerenchyma ○ xylem O phloem O none of thesearrow_forwardPlease answer q3arrow_forwardRespond to the following in a minimum of 175 words: How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients? What are some potential ethical issues associated with using this technology? Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.arrow_forward
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