Unit 6: Mendelian Genetics

Front

What is the genotype of a carrier for Cystic Fibrosis?

Back

Cc

Front

What do we call organisms that have two different alleles for a trait?

Back

Heterozygous

Front

How many alleles does an offspring receive from each parent for a specific trait?

Back

One

Front

What biomolecule contains the genetic code?

Back

DNA

Front

What term describes the gene combinations present in an organism?

Back

Genotype

Front

What is the phenotype of an organism?

Back

The observable traits or characteristics of an organism.

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous has two identical alleles (e.g., TT or tt), while heterozygous has two different alleles (e.g., Tt).

Front

What is a test cross used for?

Back

To determine the genotype of an organism with a dominant phenotype by crossing it with a homozygous recessive organism.

Front

What is the definition of an allele?

Back

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

Front

What does it mean if a trait is recessive?

Back

A recessive trait is expressed only when two recessive alleles are present (e.g., cc).