Genetics

Genotype refers to the ...

• physical expression of the genes
• the possible combination of alleles in a gene
• whether an allele is dominant or recessive
• how an organism will appear

What is a phenotype?

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

Having two of the same same alleles(TT) for the trait and sometimes called purebred.

• homozygous
• hetrozygous
• protein
• chromosome

Having two different alleles(Tt) for a trait and also referred to as hybrid.

• protein
• homozygous
• heterozygous
• genotype

G = green, g = yellow
The genotype for a yellow plant is...

• GG
• Gg
• gg
• all of the choices result in yellow

Which of the following is homozygous dominant?

• Yy
• Y
• yy
• YY

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

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

In DNA, Adenine pairs with ___________. 

• Guanine
• Cytosine
• Thymine
• Uracil

In RNA, Uracil pairs with ______. 

• cytosine
• adenine
• guanine
• thymine

DNA holds the code for making

• lipids

• carbohydrates

• proteins

• sugars