Genetics and Inheritance

Chromosomes and Inheritance

Multiple Choice

What is a gene?

• a section of DNA that controls a trait

• a physical characteristic of an organism that can be inherited

• a single strand of DNA wrapped tightly around proteins

• a version of a gene that results in a specific phenotype

• the specific chromosome and region where a gene is located

Multiple Choice

What is an allele?

• a section of DNA that controls a trait

• a physical characteristic of an organism that can be inherited

• a single strand of DNA wrapped tightly around proteins

• a version of a gene that results in a specific phenotype

• the specific chromosome and region where a gene is located

Multiple Choice

Which word is used to describe the genotype of an organism with 2 different alleles in their genome?

• hypertonic

• homozygous

• phenotype

• heterozygous

Multiple Choice

What is a chromosome?

• a section of DNA that controls a trait

• a physical characteristic of an organism that can be inherited

• a single strand of DNA wrapped tightly around proteins

• a version of a gene that results in a specific phenotype

• the specific chromosome and region where a gene is located

Fill in the Blank

Sexually reproducing organisms have ____ alleles for every gene

Multiple Choice

What is a trait?

• a section of DNA that controls a trait

• a physical characteristic of an organism that can be inherited

• a single strand of DNA wrapped tightly around proteins

• a version of a gene that results in a specific phenotype

• the specific chromosome and region where a gene is located

Multiple Choice

What word describes the physical characteristics expressed by genes?

• genotype

• phenotype

• alleles

• chromosomes

Multiple Choice

What is a locus?

• a section of DNA that controls a trait

• a physical characteristic of an organism that can be inherited

• a single strand of DNA wrapped tightly around proteins

• a version of a gene that results in a specific phenotype

• the specific chromosome and region where a gene is located

Multiple Choice

What is an allele?

• a section of DNA that controls a trait

• a physical characteristic of an organism that can be inherited

• a single strand of DNA wrapped tightly around proteins

• a version of a gene that results in a specific phenotype

• the specific chromosome and region where a gene is located

Multiple Choice

R = red flowers, r = white flowers.

What describes the phenotype of a flower with the genotype Rr?

• Red

• White

• Heterozygous

• Homozygous