Adaptation, Natural Selection and Evolution

Alternative forms of a gene are called

• Alleles
• Homozygous
• DNA
• Genetics

The allele combinations

• genetics
• mitosis
• genotype
• phenotype

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

This trait will always be expressed if present because it will mask the expression of others

• stem cells
• heterozygous
• dominant
• recessive

Hair colour is an example of

• genotype
• phenotype

Having the genes for baldness is an example of

• genotype
• phenotype

Homozygous is when...

• the alleles are the same
• the alleles are different
• the alleles are absent
• the alleles are present

Heterozygous is when...

• the alleles are the same
• the alleles are different
• the alleles are absent
• the alleles are present

An organism with the genotype DD for a trait is __. Select all that apply.

• dominant

• recessive

• homozygous

• heterozygous

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT