Genes and Alleles

Genes and Alleles

Assessment

Flashcard

Biology

9th - 12th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a gene?

Back

A gene is a segment of DNA that contains the instructions for building a specific protein or set of proteins, which determine traits in an organism.

2.

FLASHCARD QUESTION

Front

What is an allele?

Back

An allele is a variant form of a gene that can produce different traits. For example, the gene for flower color in pea plants has alleles for purple and white.

3.

FLASHCARD QUESTION

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as PP or pp.

4.

FLASHCARD QUESTION

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Pp.

5.

FLASHCARD QUESTION

Front

What is the difference between genotype and phenotype?

Back

Genotype is the genetic makeup of an organism (the alleles it carries), while phenotype is the observable expression of that genetic makeup (the traits displayed).

6.

FLASHCARD QUESTION

Front

What is a dominant allele?

Back

A dominant allele is one that expresses its trait even when only one copy is present in the genotype (e.g., P in Pp).

7.

FLASHCARD QUESTION

Front

What is a recessive allele?

Back

A recessive allele is one that only expresses its trait when two copies are present in the genotype (e.g., pp).

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