Unit 3- Science

Chromosomes are only inherited from one parent.

• True

• False

What is the study of genetics called?

• dominance

• pea plants

• heredity

• mutations

The phenotype are the physical traits that are expressed in an organism.

• True

• False

The genotype is the ______________.

• physical appearance
• Genetic makeup
• Alleles gained from one parent

The phenotype is the _______________.

• physical appearance of an organism
• Genetic makeup 
• Alleles acquired from a specific parent.

An allele whose trait only shows up when no dominant allele is present.

• hidden allele
• dominant allele
• recessive allele
• present allele

An allele whose trait always shows up in the organism when the allele is present.

• recessive allele
• dominant allele
• hidden allele
• present allele

What becomes a trait even if only one allele of the gene is present and is represented by a capital letter?

• recessive

• dominant

• allele

• genotype

• phenotype

What becomes a trait only if both alleles of the gene are present and is represented by a lowercase letter?

• recessive

• dominant

• allele

• genotype

• phenotype

What genotype would go in box 2?

• BB
• Bb
• bb