Heredity and Genetic Traits

Front

What is DNA?

Back

DNA (Deoxyribonucleic Acid) is the molecule that carries the genetic instructions for life. It looks like a long twisted ladder.

Front

What makes your DNA unique?

Back

Your set of DNA is unique to you, meaning it is different from your siblings' and parents' DNA.

Front

What are genotypes?

Back

Genotypes are the genetic makeup of an organism, represented by letters (e.g., Aa, DD, Ba, yy).

Front

What is a homozygous recessive genotype?

Back

A homozygous recessive genotype has two identical recessive alleles, such as 'bb'.

Front

What is a phenotype?

Back

A phenotype is the observable physical characteristics of an organism, such as color or height.

Front

Which of the following is NOT a phenotype: black fur, blue eyes, brown hair, or bb?

Back

bb is NOT a phenotype; it is a genotype.

Front

What is a chromosome?

Back

A chromosome is a structure made of DNA and proteins that contains genetic information.

Front

How many chromosomes do humans have?

Back

Humans typically have 46 chromosomes, arranged in 23 pairs.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present, while recessive traits are expressed only when two recessive alleles are present.

Front

What is an allele?

Back

An allele is a variant form of a gene that can result in different traits.