NCEA Level 2 Biology Genetics Exam
Questions and Answers Graded A+
Adenine - Correct answer-Is a base found in DNA and RNA. In DNA its partner is
Thymine. In RNA its partner is Uracil
Alleles - Correct answer-Two alternative forms of a gene e.g Tall vs Short
Cytosine - Correct answer-Is a base found in DNA and RNA. Cytosine pairs with
Guanine in DNA
DNA - Correct answer-Deoxyribonucleic acid carries the genetic code for the
proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose)
four bases Adenine, Thymine, Cytosine and Guanine. the sugar is bonded to a
phosphate group. This forms a long chain. It is a double helix. The bases are joined
by a hydrogen bond.
Dominant - Correct answer-Is a trait that is more expressed than another trait. Is
written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the
allele for tall trait and t is the trait for small. T will be expressed more.
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, Double Helix - Correct answer-shape of a DNA molecule formed when two twisted
DNA strands are coiled into a springlike structure and held together by hydrogen
bonds between the bases.
Gene - Correct answer-is a sequence of DNA that codes for a protein and thus
determines a trait. This is because the sequence of bases code for certain proteins.
Genotype - Correct answer-Is the genetic makeup of an organism (TT or Tt) ; All
the combinations of genes you have for a certain trait.
Guanine - Correct answer-Is a base found in DNA and RNA. This base pairs with
Cytosine in DNA
Heterozygous - Correct answer-Term used to refer to an organism that has two
different alleles for the same trait. e.g Tt is the heterozygous genotype for Tall.
Homozygous - Correct answer-Term used to refer to an organism that has two
identical alleles for a particular trait. e.g TT is the homozygous genotype for Tall.
Meiosis - Correct answer-Cell division that produces reproductive cells or
gamates.This occurs in the gonads (testicle and ovaries in animals) Here the
chromosome number is halved the original amount. (each new cell has a haploid
number = n) All daughter cells are not genetically identical, this is a result of
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Questions and Answers Graded A+
Adenine - Correct answer-Is a base found in DNA and RNA. In DNA its partner is
Thymine. In RNA its partner is Uracil
Alleles - Correct answer-Two alternative forms of a gene e.g Tall vs Short
Cytosine - Correct answer-Is a base found in DNA and RNA. Cytosine pairs with
Guanine in DNA
DNA - Correct answer-Deoxyribonucleic acid carries the genetic code for the
proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose)
four bases Adenine, Thymine, Cytosine and Guanine. the sugar is bonded to a
phosphate group. This forms a long chain. It is a double helix. The bases are joined
by a hydrogen bond.
Dominant - Correct answer-Is a trait that is more expressed than another trait. Is
written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the
allele for tall trait and t is the trait for small. T will be expressed more.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Double Helix - Correct answer-shape of a DNA molecule formed when two twisted
DNA strands are coiled into a springlike structure and held together by hydrogen
bonds between the bases.
Gene - Correct answer-is a sequence of DNA that codes for a protein and thus
determines a trait. This is because the sequence of bases code for certain proteins.
Genotype - Correct answer-Is the genetic makeup of an organism (TT or Tt) ; All
the combinations of genes you have for a certain trait.
Guanine - Correct answer-Is a base found in DNA and RNA. This base pairs with
Cytosine in DNA
Heterozygous - Correct answer-Term used to refer to an organism that has two
different alleles for the same trait. e.g Tt is the heterozygous genotype for Tall.
Homozygous - Correct answer-Term used to refer to an organism that has two
identical alleles for a particular trait. e.g TT is the homozygous genotype for Tall.
Meiosis - Correct answer-Cell division that produces reproductive cells or
gamates.This occurs in the gonads (testicle and ovaries in animals) Here the
chromosome number is halved the original amount. (each new cell has a haploid
number = n) All daughter cells are not genetically identical, this is a result of
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
