Problem 15 - Biology Today and Tomorrow with Physiology

Question

Match the terms with the most suitable description. $$ \text {DNA profile} \quad \quad\quad\quad\quad \text {a. carries a foreign gene} $$ $$ \text {genomics} \quad \quad \text {b. alleles commonly have them} $$ $$ \text {CRISPR} \quad \quad \text {c. a person's unique collection of short tandem repeats} $$ $$ \text {SNP} \quad \quad \text {d. gene editing} $$ $$ \text {transgenic} \quad \quad \quad\quad\text {e. genetically modified} $$ $$ \text {GMO} \quad \quad \text {f. study of genomes} $$

Step-by-Step Solution

Answer

DNA profile: c, genomics: f, CRISPR: d, SNP: b, transgenic: a, GMO: e.

Step 1: Match DNA Profile

The term "DNA profile" is associated with a person's unique collection of genetic markers. This is usually done using short tandem repeats. Therefore, the best match for "DNA profile" is option c: "a person's unique collection of short tandem repeats."

Step 2: Match Genomics

The term "genomics" relates to the comprehensive study of genomes, which refers to the complete set of DNA within an organism, including all of its genes. Hence, the correct match for "genomics" is option f: "study of genomes."

Step 3: Match CRISPR

CRISPR is a technology used for editing genomes with precision. It enables scientists to modify the genes of an organism and is widely known for its role in gene editing. Therefore, the suitable match for "CRISPR" is option d: "gene editing."

Step 4: Match SNP

SNP stands for Single Nucleotide Polymorphism, which is a variation at a single position in a DNA sequence among individuals. These variations are crucial in genetics as they often serve as biological markers that help scientists locate genes that are associated with disease. Alleles commonly have SNPs. Therefore, the correct match is option b: "alleles commonly have them."

Step 5: Match Transgenic

A "transgenic" organism carries a foreign gene deliberately inserted into its genome. This is typically done through genetic engineering to express certain desirable traits. Thus, the match for "transgenic" is option a: "carries a foreign gene."

Step 6: Match GMO

GMO stands for Genetically Modified Organism, which refers to organisms that have been engineered to express desired traits through the modification of their genetic material. The term is often associated with "genetically modified." Hence, the match for "GMO" is option e: "genetically modified."

Key Concepts

DNA Profile

A DNA profile, often referred to as genetic fingerprinting, represents an individual's unique genetic makeup. This identification method uses short tandem repeats (STRs), which are specific sequences in the DNA that vary considerably from person to person.
These variations make it possible to distinguish one individual from another.

• Applications: DNA profiling is commonly used in forensic science for criminal investigations, paternity tests, and identifying remains.
• Process: DNA samples are collected and processed to analyze the STR patterns. These patterns are then compared against other samples for a match.

CRISPR

CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) is a groundbreaking technology that revolutionized the field of genetics. It allows scientists to edit genes with unparalleled precision, efficiency, and flexibility.

• How it works: CRISPR uses a special protein called Cas9, which acts like a pair of "molecular scissors" to cut DNA at specific locations.
• Applications: CRISPR is used in a wide range of fields, including agriculture for crop enhancement, medicine for treating genetic disorders, and research for gene function studies.
• Benefits: It is quicker, cheaper, and more accurate than previous gene editing methods.

SNP (Single Nucleotide Polymorphism)

SNPs are single base pair variations in the DNA sequence that occur commonly within a population. These are the most common type of genetic variation among people.

• Significance: SNPs can help determine the correlation between genetic variations and diseases, making them crucial for genetic research.
• Role in Genetics: They can influence how humans develop diseases and respond to pathogens, chemicals, drugs, vaccines, and other agents.
• Markers for Genetic Mapping: SNPs are used as markers to locate genes associated with complex diseases like cancer, diabetes, and Alzheimer's.

Transgenic Organisms

Transgenic organisms are those that have been genetically modified to carry genes from other species. This process involves introducing foreign DNA into an organism's genome.

• Process: Scientists use gene splicing techniques to insert genes with desirable traits into plants, animals, or bacteria.
• Applications: These organisms are used in agriculture to enhance crop resistance to pests and diseases, in medicine for producing insulin, and in research for studying diseases.
• Examples: Common examples include Bt corn, which is resistant to insect pests, and synthetic insulin produced by recombinant DNA technology.

Genetically Modified Organisms (GMO)

Genetically Modified Organisms, or GMOs, are organisms that have had their DNA altered through genetic engineering techniques to express desired traits.

• Purpose: GMOs are often created to enhance nutritional content, increase resistance to environmental stressors, and improve yield and shelf life.
• Applications: They are widely used in agriculture for producing crops like soybeans, corn, and cotton with improved resistance to pests and herbicides.
• Controversy: While GMOs offer significant benefits, they also raise concerns about their impact on health, environment, and ethical considerations related to tampering with natural genetic codes.