CSI Wildlife Re-teach

Front

What does it mean for an organism to be homozygous?

Back

An organism is homozygous when it has two identical alleles at a given locus.

Front

What does it mean for an organism to be heterozygous?

Back

An organism is heterozygous when it has two different alleles at a given locus.

Front

What is DNA fingerprinting?

Back

DNA fingerprinting is a technique used to identify individuals based on their unique DNA profiles, as no two people (except identical twins) have exactly the same DNA.

Front

What are Short Tandem Repeats (STR)?

Back

Short Tandem Repeats (STR) are variable segments of DNA that contain repeats of the same sequence of nucleotides one after another.

Front

What is the significance of alleles in genetics?

Back

Alleles are different forms of a gene that can exist at a specific locus on a chromosome, influencing traits.

Front

How can you determine if an organism is homozygous or heterozygous from genetic markers?

Back

By analyzing the alleles present at specific genetic markers, you can determine if they are identical (homozygous) or different (heterozygous).

Front

What is the role of gel electrophoresis in DNA analysis?

Back

Gel electrophoresis is a technique used to separate DNA fragments based on their size, allowing for analysis of genetic material.

Front

Why are identical twins an exception in DNA fingerprinting?

Back

Identical twins share the same DNA, making their DNA fingerprints identical, unlike non-twin siblings or unrelated individuals.

Front

What is a locus in genetics?

Back

A locus is a specific, fixed position on a chromosome where a particular gene or genetic marker is located.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their traits even when only one copy is present, while recessive alleles require two copies to express their traits.