Genetics Review 2

Physical characteristics of an organism

• chromosomes

• traits

• heredity

• homozygous

The passing of traits from parents to offspring

• genes

• traits

• heredity

• chromosomes

Different forms of a gene are called

• alleles

• DNA

• genes

• homozygous

_____ are strands of DNA found in the nucleus.

• genes

• traits

• chromosomes

• alleles

Segments of DNA that give the organism the traits are called

• chromosomes

• genes

• Allele

• nucleus

If an organism receives 2 of the same alleles from the parents, they are said to be...

• homozygous

• heterozygous

The genetic code that gives the organism its physical traits that you see (Ex. RR) is called

• genotype

• phenotype

If the organism receives this trait, the organism will automatically show this trait.

• Recessive

• Dominant

If the organism receives 2 different alleles from the parents (Rr), the organism is

• homozygous

• heterozygous

Red flowers, what you physically see is called

• genotype

• phenotype