Basics of genetics

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

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

Natural selection is when ____________ decides who survives and who doesn't

• nature
• humans
• animals
• years

Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.

• DNA
• protein
• RNA
• glucose nucleic acid (GNA)

Which of the following is homozygous dominant?

• Yy
• Y
• yy
• YY

What does heterozygous mean?

• An organism that has the same genes for a trait (TT or tt)
• An organism that has different genes for a trait (Tt)
• When neither gene is fully dominant; offspring is a mixture of both
• the different forms of a trait (hair color--> brown, blonde, red

Sex cells are produced through the process of

• mitosis
• cytokinesis
• binary fission
• meiosis

Where, in the eukaryotic cell, is DNA located?

• ribosomes
• nucleus
• E.R.
• cytoplasm

What is a phenotype

• The genetic make up (code)
• The physical trait

Having two of the same genes for the trait (sometimes called purebred)

• homozygous
• hetrozygous
• protein
• chromosome

Having two different genes for a trait (sometimes called hybrid)

• protein
• homozygous
• heterozygous
• genotype