Which of these is true about DNA? a. It can make precise copies of itself and affect the rate at which it is copied. b. It must have equal amounts of A, C, T and G. c. It tends to mutate in ways that promote fitness. d. Men have more of it than women do. e. None of the above is correct.

Q: A key difference between the nucleotides found in DNA andthose in RNA is thata. DNA has phosphate,…

A: Deoxy ribonucleic acid (DNA) is he genetioc material of most organisms, while ribonucleic acid (RNA)…

Q: Horizontal gene transfer is a process in which genetic material from an organism is a. transferred…

A: Genes are the structural and functional units of heredity that carry coded genetic information in…

Q: Which of the following is correct regarding polytene chromosomes?    options:   A.  Exposure to a…

A: DNA contains inheritable segments that are called genes that contain instructions for protein…

Q: Mutations

A: With the improvement in technology, humans are now able to alter the basic features of an organism…

Q: A key difference between B DNA and Z DNA is thata. B DNA is right-handed, whereas Z DNA is…

A: DNA is the molecule which carries the genetic information of the cell. It is a long biopolymer of…

Q: Changes in the environment are LEAST likely to have which of the following effects? A. altering…

A: Proteins are the functional product of a particular gene that are produced by the translation…

Q: Which of the following is not true of a single nucleotide polymorphism?a. It is usually caused by a…

A: Single nucleotide polymorphisms represents a difference in a single nucleotide. It occurs throughout…

Q: Which of the following is FALSE about the human genome?      a. repetitive DNA is approximately…

A: The genetic makeup of every human being is 99.9% same. Differences in the 0.1 percent that is left…

Q: What is the major reason why the maize genome is much larger than the rice genome?a. Maize has more…

A: What is the major reason why the maize genome is much:

Q: If individuals IV-1 and IV-3 had a child together, what is the probability they will have Bloom…

A: The mode of inheritance of bloom syndrome is an autosomal recessive mode of inheritance. This means…

Q: Which of the following may be detected using a karyotype?a. point mutationsb. a specific genetic…

A: Karyotype refers to a laboratory technique to produce an image of an individual’s chromosomes.

Q: A scientist is curious about the effects of diet on the gut length of spadefoot toad tadpoles.  She…

A: Tadpole  It is a stage in the life cycle og amphibians. Most of the tadpole live in the water and…

Q: Hairpins are formed in DNA as a result of a. sequences on the same strand that are inverted and…

A: Intra-molecular base pairing in single stranded DNA or RNA leads to the formation of stem loop…

Q: Examining the DNA of a cancerous cell, a scientist would find strong expression of A. siRNAs. B.…

A: Option c i.e. oncogenes is the correct statement for the above question.

Q: What is the central dogma of molecular biology? a. DNA is the genetic material. b. Information…

A: Genetic material is nothing but the sequence of nucleic acids which is called as DNA. It contains…

Q: A student reads that deer mice that migrated to the hills of Nebraska originally had dark colored…

A: Mutation is a sudden change in the sequence of base pairs resulting in altered phenotype.

Q: Which of the following is a good definiton of "mutation." A. A change in the nucleotide sequence…

A: Any alteration or change in the nucleotide sequence of DNA is called mutation and this causes…

Q: A television commercial featuring former cyclist Lance Armstrong talked about the possibility of…

A: The benefits are:-With the genome sequence of the person being known, the person can be more careful…

Q: A nerve cell and a skin cell from the same person  have Group of answer choices A. different gene…

A: When fertilization occurs, the two cells ie the egg cells and the sperm cells fuse to form a zygote.…

Q: Which of the following is not a key property of hereditarymaterial?a. It must be capable of being…

A: Introduction  DNA serves as the main genetic material in various organisms be it prokaryotes or…

Q: Homologous recombination refers to the exchange of DNA segmentsthat area. similar or identical in…

A: Genetic recombination is a process in which exchange of genetic material occurs between 2…

Q: Compare and contrast the following terms: a. Eukaryotic and prokaryotic cells b. Gene and allele c.…

A: Living organisms are defined based on the presence of one or more cells in their bodies.

Q: The most common source of DNA mutation is _____; however, these mistakes are typically corrected.​…

A: To understand the structure of nucleic acid, it is necessary to first understand the structure of…

Q: Two cells use the same segment of DNA to produce two different proteins. The mRNA transcribed by…

A: A gene is a DNA-based functional heredity unit that delivers instructions for the production of RNA…

Q: One of the mechanisms that leads to the DNA mutations is a process known as DNA polymerase slippage…

A: DNA slippage is a type of DNA strand misfiring mechanism that occurs in the repeated nitrogenous…

Q: Which of the following is a/are false characteristic(s) regarding DNA? A.    DNA can be found in…

A: DNA is the genetic material which is responsible for transferring the genetic information from one…

Q: Biology The lab responsible for genotyping the hair color of the subject is taking forever. When you…

A: Single nucleotide polymorphism refers to the germline substitution at a particular position in the…

Q: A codon is a. one of three nucleotides that encode an amino acid. b. three nucleotides that encode…

A: DNA is transcribed into mRNA.  mRNA has codons which are translated into amino acids. Every codon…

Q: Protein synthesis is the process of building a phenotype from a genotype. In 100-200 words explain…

A: The DNA contain the genetic information in terms of their nucleotide sequence which is present…

Q: What happens to an organism (plant, animal, or microorganism) during genetic modification? A. Fewer…

A: Genetic engineering is a part of recombinant technology in which the gene is altered. A gene is a…

Q: Why are errors in DNA methylation so destructive to cells? a. They cause improper activation or…

A: ANSWER Why are errors in DNA methylation so destructive to cells? a. They cause improper…

Q: Which of the following statements about coding strands of a gene is false? a. The sequence of the…

A: Coding strand is the DNA template whose nucleotide sequence is similar to the base sequence of the…

Q: Which of these occurs as we get older?a. Neurons replicate to replace lost neurons.b. Skeletal…

A: Aging is considered as the progressive physiological changes in an organism that lead to senescence,…

Q: Which gene type is INCORRECTLY matched with its type of genomic sequence? a. FRNA gene: moderately…

A: Answer: Genomic sequences = These are the sequences present in chromosomes which codes for a…

Q: Which statement about DNA bases is true?   A. Adenine and guanine are purines.   B. Thymine and…

A: A nucleotide is the basic building block of nucleic acids. Ribonucleic acid (RNA) and…

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.