Is pure line homozygous?
-The pure line is true-breeding genotypes. It is a line that in successive generations has been made homozygous with all genes under consideration. It is a line in which homozygous individuals only bear homozygous offspring like parents. Therefore, pure line breed only applies to homozygosity.
Can pure line be heterozygous?
Pure lines are obtained through repeated self-fertilization of heterozygous individuals or consanguineous crosses in heterozygous populations. Under Mendelian inheritance, the offspring of a single self-fertilization will be heterozygous for one-half as many genes as the parent.
What is the difference between pure and hybrid?
In the simplest possible terms, purebreds are the offspring that result from mating between genetically similar parents while hybrids are the offspring that are the result of mating between two genetically dissimilar parents.
What is meant by homozygosity?
Homozygosity is the state of possessing two identical forms of a particular gene, one inherited from each parent. The opposite is heterozygous, the possession of two different forms of a particular gene, one inherited from each parent.
What is the function of pure lines?
Similarly, the production of pure lines from segregating populations is also necessary to identify genes for a trait of interest. The developed pure lines provide permanent populations allowing phenotyping of traits of the same genotypes at different times and under different environmental conditions.
What is the difference between homozygous and heterozygous chromosome?
Homozygous genotype carries a similar but, only one type of allele- either dominant or recessive for a particular trait. Heterozygous genotype carries different or dissimilar alleles for a specific trait. It comprises both dominant and recessive alleles.
What is heterozygous and homozygous examples?
Homozygous means that the organism has two copies of the same allele for a gene. … Heterozygous means that an organism has two different alleles of a gene. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white).
Is pure line dominant or recessive?
Each parent has a gene pair in each cell for each trait studied. The F1 from a cross of two pure lines contains one allele for the dominant phenotype and one for the recessive phenotype.
What is the difference between pure line and inbred line?
The term “pure line” is sometimes incorrectly applied to inbred lines, which are the progeny of animals or cross-pollinated plants obtained from a single pair of ancestors and maintained over a number of generations by constant crossing of related individuals and by selection. …
What is the meaning of pure lines in biology?
pure line A population of plants or animals all having a particular feature that has been retained unchanged through many generations. The organisms are homozygous and are said to `breed true’ for the feature concerned. A Dictionary of Biology.