Genetics - Alleles / Dominant / Heterozygous / Phenotypes

What is a gene?

• A segment of DNA that codes for a particular type of protein

• A type of cell in the body

• A type of virus that affects DNA

• A type of protein found in DNA

What are alleles?

• Alternative form of a gene

• Segments of RNA that code for proteins

• A chromosome

• Entire strand of DNA in a chromosome

What does homozygous mean?

• Having no alleles for a gene

• Having two different alleles for a gene

• Having two identical alleles for a gene

• Having multiple alleles for a gene

Which allele gets expressed in a heterozygous individual?

• Recessive allele

• None of the alleles

• Both alleles equally

• Dominant allele

What is the phenotype of an organism?

• The size of an organism

• The genetic code of an organism

• The physical characteristics that result from the genotype

• The number of alleles an organism has

What determines the characteristics we develop?

• Exercise habits

• Weather conditions

• Food we eat

• Genes we inherit

How many alleles of each gene do we have?

• One

• Three

• Two

• Four

What is the difference between genotype and phenotype?

• Genotype and phenotype are unrelated

• Genotype is the genetic code, phenotype is the physical characteristics

• Genotype is the physical characteristics, phenotype is the genetic code

• Genotype and phenotype are the same thing

What is the reason for having different alleles for the same gene?

• Variations in chromosome numbers

• Due to the environmental factors

• Due to the food they eat

• Variations in physical characteristics

In genetics, what does dominant mean?

• An allele that is rare in the population

• An allele that is hidden by another allele

• An allele that is never expressed

• An allele that is always expressed