Đề 2 – Bài tập, đề thi trắc nghiệm online Di truyền học

A A. 3:1 B B. 1:2:1 C C. 9:3:3:1 D D. 1:1

A A. Deletion B B. Insertion C C. Point mutation D D. Frameshift mutation

A A. To initiate DNA replication B B. To protect the ends of chromosomes from degradation and fusion C C. To organize chromosomes within the nucleus D D. To regulate gene expression

A A. Identifying the function of a gene B B. Determining the sequence of a gene C C. Locating genes on chromosomes and determining their relative distances D D. Manipulating genes using biotechnology

A A. To unwind DNA B B. To synthesize DNA C C. To join DNA fragments together D D. To degrade DNA

A A. Transformation B B. Transduction C C. Conjugation D D. Mutation

A A. To join DNA fragments together B B. To cut DNA at specific sequences C C. To replicate DNA D D. To repair DNA

A A. One gene affecting multiple traits B B. Multiple genes affecting one trait C C. Genes located on the same chromosome D D. Genes that are expressed only in specific tissues

A A. All the genes in a single organism B B. All the genes in a population at a given time C C. All the genes in a species D D. All the genes in a family lineage

A A. Substitution of one base for another B B. Insertion or deletion of bases that is not a multiple of three C C. Inversion of a segment of DNA D D. Duplication of a gene

A A. Transcription B B. Translation C C. Replication D D. Mutation

A A. 3:1 B B. 1:2:1 C C. 9:3:3:1 D D. 1:1:1:1

A A. Adenine B B. Guanine C C. Cytosine D D. Uracil

A A. Double-stranded structure B B. Contains deoxyribose sugar C C. Uses uracil as a base D D. Phosphate backbone

A A. Incomplete dominance shows both alleles fully expressed, while codominance shows a blended phenotype. B B. Incomplete dominance shows a blended phenotype, while codominance shows both alleles fully and separately expressed. C C. Incomplete dominance only affects recessive traits, while codominance affects dominant traits. D D. Incomplete dominance involves multiple genes, while codominance involves a single gene.

A A. Protein -> RNA -> DNA B B. RNA -> DNA -> Protein C C. DNA -> RNA -> Protein D D. DNA -> Protein -> RNA

A A. Cystic fibrosis B B. Sickle cell anemia C C. Hemophilia D D. Tay-Sachs disease

A A. mtDNA is used to study paternal lineage. B B. mtDNA is located in the nucleus and is easier to access. C C. mtDNA is maternally inherited and can be used to trace maternal lineage and human migration. D D. mtDNA is more prone to mutations and thus less reliable for genetic studies.

A A. Genotype B B. Phenotype C C. Allele D D. Locus

A A. To amplify DNA B B. To sequence DNA C C. To separate DNA fragments by size D D. To introduce foreign DNA into cells

A A. Skips generations B B. Affects males more frequently than females C C. Affected individuals have at least one affected parent D D. Only homozygous individuals are affected

A A. Evolution of new species B B. Genetic drift in small populations C C. Conditions under which allele and genotype frequencies in a population remain constant D D. The effect of natural selection on phenotype frequencies

A A. Carries genetic information from DNA to ribosomes B B. Forms the structural component of ribosomes C C. Brings amino acids to the ribosome D D. Catalyzes peptide bond formation

A A. Chromosome B B. Gene C C. DNA D D. Nucleotide

A A. Unwinding the DNA double helix B B. Synthesizing RNA primers C C. Adding nucleotides to the growing DNA strand D D. Joining DNA fragments

A A. Heterozygous B B. Homozygous C C. Hemizygous D D. Polyploid

A A. Replication B B. Transcription C C. Translation D D. Transformation

A A. DNA replication B B. Transcription of DNA to mRNA C C. Translation of mRNA to protein D D. RNA processing

A A. To cut DNA into fragments B B. To amplify a specific DNA sequence C C. To separate DNA fragments by size D D. To determine the sequence of DNA

A A. The study of gene mutations B B. The study of changes in gene expression that are heritable but do not involve alterations to the DNA sequence C C. The study of gene flow in populations D D. The study of gene editing techniques