7th grade: Genetics Quiz #2

Heterozygous

• Different forms of a gene. 
• A combination of two alleles that are different from one another
• The chemical compound found in the nucleus of each cell; the genetic code for all of your traits 
• A combination of two alleles that are the same. 

Genotype

• The genetic combination of alleles the offspring receives.  (The letters that make-up the genetic code for a trait)
• A type of gene that always shows itself when present
• Different forms of a gene.
• A section of DNA that codes for a trait

Gene

• The physical appearance of the allele combination the offspring receives
• The chemical compound found in the nucleus of each cell; the genetic code for all of your traits 
• A section of DNA that codes for a trait 
• A combination of two alleles that are the same.

Homozygous

• The genetic combination of alleles the offspring receives.  (The letters that make-up the genetic code for a trait)
• A combination of two alleles that are different from one another.
• A type of gene that can be hidden 
• A combination of two alleles that are the same.

Recessive

• A type of gene that can be hidden 
• A type of gene that always shows itself when present
• A combination of two alleles that are different from one another
• The chemical compound found in the nucleus of each cell; the genetic code for all of your traits 

Dominant

• A section of DNA that codes for a trait 
• A type of gene that always shows itself when present
• A combination of two alleles that are different from one another
• the genetic code for all of your traits 

Phenotype

• A combination of two alleles that are different 
• A combination of two alleles that are the same
• The physical appearance of the allele combination the offspring receives
• A type of gene that can be hidden 

DNA

• The chemical compound found in the nucleus of each cell
• ; the genetic code for all of your traits 
• Both answers are correct
• None of the above

Allele

• the genetic code for all of your traits 
• A type of gene that can be hidden
• A type of gene that always shows itself when present
• Different forms of a gene

True or False:
Offspring can ONLY show traits that are identical to at least one parent. 

• True- offspring and parents always have identical physical traits
• True- If at least one parent has the physical trait all of the offspring will have that same trait
• False- Offspring may show recessive traits that do not physically show up in their parents
• False-If the trait is not seen in the parent, then it cannot be in their offspring