MCA Science Review Exam Questions &
Answers (Grade A+)
Genetics -
correct answer ✅the study of how traits are passed on
Heredity -
correct answer ✅the passing on of traits from parent to offspring
(child)
Chromosomes -
correct answer ✅fine, threadlike structures made of DNA, found in
the nucleus, you have 46 in every cell
DNA -
correct answer ✅contain your genes, the "instructions" for your
body, made up of 4 bases (A, G, C, and T)
Gene -
correct answer ✅a unit of heredity that has a specific location on
your DNA/chromosomes and codes for a particular trait
Traits -
correct answer ✅characteristics of living things (examples: eye
color, height, nose shape)
,MCA Science Review Exam Questions &
Answers (Grade A+)
Genotype -
correct answer ✅genetic code used for each trait; represented as
letters
Phenotype -
correct answer ✅the trait that can be seen; physical appearance
Dominant -
correct answer ✅traits that present (show) themselves;
(uppercase letters)
Recessive -
correct answer ✅traits that "hide"; will only show themselves if
there are two of these genes; (lowercase letters)
Heterozygous -
correct answer ✅two different versions of a gene (two different
sized letters)
, MCA Science Review Exam Questions &
Answers (Grade A+)
Homozygous -
correct answer ✅two identical versions of a gene (two letters of
the same size)
Allele -
correct answer ✅Different versions of a trait or gene
Ecology -
correct answer ✅study of relationships of living and non-living
things
Environment -
correct answer ✅our surroundings
Ecologist -
correct answer ✅a person who studies ecology
Ecosystem -
correct answer ✅an area where the living and non-living things
interact and affect each other
Answers (Grade A+)
Genetics -
correct answer ✅the study of how traits are passed on
Heredity -
correct answer ✅the passing on of traits from parent to offspring
(child)
Chromosomes -
correct answer ✅fine, threadlike structures made of DNA, found in
the nucleus, you have 46 in every cell
DNA -
correct answer ✅contain your genes, the "instructions" for your
body, made up of 4 bases (A, G, C, and T)
Gene -
correct answer ✅a unit of heredity that has a specific location on
your DNA/chromosomes and codes for a particular trait
Traits -
correct answer ✅characteristics of living things (examples: eye
color, height, nose shape)
,MCA Science Review Exam Questions &
Answers (Grade A+)
Genotype -
correct answer ✅genetic code used for each trait; represented as
letters
Phenotype -
correct answer ✅the trait that can be seen; physical appearance
Dominant -
correct answer ✅traits that present (show) themselves;
(uppercase letters)
Recessive -
correct answer ✅traits that "hide"; will only show themselves if
there are two of these genes; (lowercase letters)
Heterozygous -
correct answer ✅two different versions of a gene (two different
sized letters)
, MCA Science Review Exam Questions &
Answers (Grade A+)
Homozygous -
correct answer ✅two identical versions of a gene (two letters of
the same size)
Allele -
correct answer ✅Different versions of a trait or gene
Ecology -
correct answer ✅study of relationships of living and non-living
things
Environment -
correct answer ✅our surroundings
Ecologist -
correct answer ✅a person who studies ecology
Ecosystem -
correct answer ✅an area where the living and non-living things
interact and affect each other
