VP #6: Amoeba Sisters Alleles and Genes

Eye color is determined by

• the interaction of MANY genes.

• the interaction of 2 genes.

• one set of genes, one from mom and one from dad.

• diet and nutrition

How many chromosomes do humans have in each cell?

• 46
• 44
• 48
• 50

Chromosomes are in pairs because

• Chromosomes are formed during cell division.
• Chromosomes are only found in plant cells.
• Chromosomes are inherited from both parents.
• Chromosomes are created by environmental factors.

What is an allele?

• A type of chromosome
• A type of protein
• An allele is a variant form of a gene.
• A genetic mutation

A dominant allele is represented by

• a symbol
• a capital letter
• a lowercase letter
• a number

What is a phenotype?

• The environment in which an organism lives.
• The process of natural selection.
• The genetic makeup of an organism.
• The observable traits of an organism.

Predict: Since she CAN'T taste PTC, what is her GENOTYPE?

• TT

• Tt

• tt

• tT

Predict: If Petunia has both recessive traits, what alleles would her parents have to have?

• At least one parent must have two dominant alleles.
• Both parents must have at least one recessive allele for each trait.
• Both parents must have only dominant alleles.
• One parent must have a recessive allele and the other a dominant allele.

What is polydactyly?

• A condition of having fewer fingers or toes.
• A genetic disorder that affects skin pigmentation.
• A type of bone disease that causes joint pain.
• Polydactyly is a condition of having extra fingers or toes.

Is polydactyly a dominant or recessive trait?

• Recessive
• X-linked
• Autosomal
• Dominant