Table of Contents
- 1 What is the biological and chemical methods that change the arrangements of DNA that make up a gene?
- 2 What is it called when the presence of two different alleles results in an intermediate?
- 3 What is it called when an individual has different alleles for the same gene?
- 4 What makes a cell undergo evolution and mutation?
What is the biological and chemical methods that change the arrangements of DNA that make up a gene?
Genetics 2
| Question | Answer |
|---|---|
| A normal allele can be intorduced into bacteria to produce | insulin |
| Making ________ DNA is one method of genetic engineering. | recombinant |
| Through ________ engineering, scientist are experimenting with biological and chemical methods to change the arrangement of DNA that makes up a gene. | genetic |
What is it called when the presence of two different alleles results in an intermediate?
Key Points. Incomplete dominance is the expression of two contrasting alleles such that the individual displays an intermediate phenotype. Codominance is a variation on incomplete dominance in which both alleles for the same characteristic are simultaneously expressed in the heterozygote.
What is it called when an individual has different alleles for the same gene?
If the two alleles are the same, the individual is homozygous for that gene. If the alleles are different, the individual is heterozygous. Though the term allele was originally used to describe variation among genes, it now also refers to variation among non-coding DNA sequences.
What is it called when an intermediate phenotype occurs and no allele dominates?
Incomplete dominance occurs in the heterozygote, in which the dominant allele does not dominate the recessive allele entirely; rather, an intermediate trait appears in the offspring. The formed trait (phenotype) is not different due to the no mixing of both parents’ phenotypes and genotypes.
What is heterozygous or homozygous genotype?
Heterozygous refers to having inherited different forms of a particular gene from each parent. A heterozygous genotype stands in contrast to a homozygous genotype, where an individual inherits identical forms of a particular gene from each parent.
What makes a cell undergo evolution and mutation?
Genetic variations can arise from gene variants (also called mutations) or from a normal process in which genetic material is rearranged as a cell is getting ready to divide (known as genetic recombination). Genetic variations that alter gene activity or protein function can introduce different traits in an organism.