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Genetics 9

BIO 151L

QuestionAnswer
Genetics The study of heredity
Heredity The transmission of traits from parents to offspring
Gene Specific sequence of nucleotides found on a specific location within a chromosome that codes for a specific trait
Genotype The actual genetic makeup an organism possesses for a certain trait
Phenotype The outward expression, or physical appearance, of an organism's genotype
Alleles Alternate forms of a gene coding for the same trait
Heterozygous The two alleles for a trait are different from each other
Homozygous Alleles for a trait are the same
Genetics The study of heredity
Heredity The transmission of traits from parents to offspring
Gene Specific sequence of nucleotides found on a specific location within a chromosome that codes for a specific trait
Genotype The actual genetic makeup an organism possesses for a certain trait
Phenotype The outward expression, or physical appearance, of an organism's genotype
Alleles Alternate forms of a gene coding for the same trait
Heterozygous The two alleles for a trait are different from each other
Homozygous Alleles for a trait are the same
Complete dominance The effect of only one allele is evident in the phenotype
Genetics The study of heredity
Heredity The transmission of traits from parents to offspring
Gene Specific sequence of nucleotides found on a specific location within a chromosome that codes for a specific trait
Genotype The actual genetic makeup an organism possesses for a certain trait
Phenotype The outward expression, or physical appearance, of an organism's genotype
Genetics The study of heredity
Heredity The transmission of traits from parents to offspring
Gene Specific sequence of nucleotides found on a specific location within a chromosome that codes for a specific trait
Genotype The actual genetic makeup an organism possesses for a certain trait
Phenotype The outward expression, or physical appearance, of an organism's genotype
Alleles Alternate forms of a gene coding for the same trait
Sex-linked genes/ X-linked genes The non-sex determining genes found on sex chromosomes. Probability of these traits showing up in an individual changes depending on gender
Heterozygous The two alleles for a trait are different from each other
Nondisjunction When members of a homologous pair fail to separate during Meiosis I
Homozygous Alleles for a trait are the same
Codominance Both alleles are expressed in the phenotype
Complete dominance The effect of only one allele is evident in the phenotype
Dominant allele Expressed allele
Hybrid An organism that is heterozygous for a particular trait
Recessive allele The allele which is masked by the dominant gene
Monohybrid cross Two parents that are heterozygous for one trait being studied are mated
Incomplete dominance One allele incompletely dominates the other, and the phenotype is an intermediate between the parents
Dihybrid cross Two individuals heterozygous for two traits being studied are mated
Codominance Both alleles are expressed in the phenotype
Sex chromosomes Each gamete must contain one gene from each gene pair
Hybrid An organism that is heterozygous for a particular trait
Monohybrid cross Two parents that are heterozygous for one trait being studied are mated
Dihybrid cross Two individuals heterozygous for two traits being studied are mated
Sex chromosomes Consist of two large X chromosomes for females and one large X chromosome with one smaller Y chromosome for males
Sex-linked genes/ X-linked genes The non-sex determining genes found on sex chromosomes. Probability of these traits showing up in an individual changes depending on gender
Nondisjunction When members of a homologous pair fail to separate during Meiosis I
Monosomy There is one less chromosome than usual
Trisomy There is one ore chromosome than usual
Amniocentesis A procedure involving the withdrawal of a sample of the amniotic fluid containing fetal cells
Pedigree charts Show the inheritance of a genetic disorder within a family and ca help determine whether any particular individual has an allele for that disorder
Karyotype Can be constructed when the chromosomes of the fetal skin cells are photographed and arranged in order according to their size and the placement of the centromere
Created by: AliRutherford