Which of the mutations would most likely have the least severe consequences?

Which of the mutations would most likely have the least severe consequences?

A point mutation—the change of a single nitrogen base in a DNA sequence—is usually the least harmful type of DNA mutation.

What is homozygous?

(HOH-moh-ZY-gus JEE-noh-tipe) The presence of two identical alleles at a particular gene locus. A homozygous genotype may include two normal alleles or two alleles that have the same variant.

Which of the following statements explains why restriction enzymes are not useful for genome wide studies of genetic variation?

Which of the following statements explains why restriction enzymes are not useful for genome-wide studies of genetic variation? Using restriction enzymes will only tell us differences in sequence variation in restriction sites.

Are true-breeding plants typically heterozygous?

True-breeding plants are typically heterozygous for most genes.

Are mutations always harmful?

Most mutations are not harmful, but some can be. A harmful mutation can result in a genetic disorder or even cancer. Another kind of mutation is a chromosomal mutation. Chromosomes, located in the cell nucleus, are tiny threadlike structures that carry genes.

What type of mutation is most harmful?

frameshift mutation
Deletion mutations, on the other hand, are opposite types of point mutations. They involve the removal of a base pair. Both of these mutations lead to the creation of the most dangerous type of point mutations of them all: the frameshift mutation.

What is a heterozygous mutation?

A mutation affecting only one allele is called heterozygous. A homozygous mutation is the presence of the identical mutation on both alleles of a specific gene. However, when both alleles of a gene harbor mutations, but the mutations are different, these mutations are called compound heterozygous.

What is a homozygous mutation?

We would then say that individual is homozygous for that mutation. They have two identical copies of the deleterious version of that gene and, as a result, they are then going to be predisposed to the genetic condition the gene codes for.

Which of the statements explains the fact that humans have a relatively large number of mutations per genome per generation when compared to other organisms?

The fact that humans have a relatively large number of mutations per genome per generation when compared to other organisms can be explained by: most of a human’s DNA is noncoding, so most of the mutations are neutral.

Which of the following statements best describes one of the differences between prokaryotic and eukaryotic genomes?

Which of the following statements best describes one of the differences between prokaryotic and eukaryotic genomes? Prokaryotic genomes do not include noncoding regions (introns) while eukaryotic genomes do.

Is true-breeding always homozygous?

In Mendelian genetics, this means that an organism must be homozygous for every trait for which it is considered true breeding; that is, the pairs of alleles that express a given trait are the same. In a purebred strain or breed, the goal is that the organism will “breed true” for the breed-relevant traits.

What is the difference between heterozygous and homozygous individuals?

Homozygous: You inherit the same version of the gene from each parent, so you have two matching genes. Heterozygous: You inherit a different version of a gene from each parent. They do not match.

What type of mutations are quickly weeded out of a population?

Harmful mutations are always quickly weeded out of a population. (T/F) restriction fragment length polymorphisms. Nice work! You just studied 51 terms! Now up your study game with Learn mode.

Does natural selection weed out harmful mutations?

It is generally assumed by evolutionists that natural selection tends to “weed out” harmful mutations. After all, if a mutation is harmful to an organism, that organism will be less fit to survive and less likely to pass on that mutation to its progeny.

What happens when there are too many mutations?

Many mutations reduce fitness too much to accumulate in a population, but some maladaptive DNA changes have effects small enough to spread (Keightley & Eyre-Walker 2010). A species could be driven to extinction by their accumulation unless there are sufficiently many adaptive mutations.

Can a species be driven to extinction by accumulation of mutations?

A species could be driven to extinction by their accumulation unless there are sufficiently many adaptive mutations.