Mendel's observations of single factor crosses_____F1 offspring and_____F2 offspring exhibit the dominant phenotype. The______during gamete formation in F1 offspring determines ratio of phenotypes observed in the F2
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
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In Mendel's observations of single factor crosses_____F1 offspring and_____F2 offspring exhibit the dominant phenotype. The______during gamete formation in F1 offspring determines ratio of
choices are: 3/4 of the, all, segregation of alleles, independent assortment of alleles, 1/4 of the
Genetics is an interesting division of biology that exclusively deals with the passing on of hereditary traits from parents to offsprings and the variations that are seen in different individuals. Gregor Mendel, a Christian priest from Austria who is known as the father of modern genetics. He successfully understood the hereditary pattern in generations. He performed his research on the pea plants that grew on the lawn of the church. It took him seven long years to complete his hybridization experiments. He wanted to establish laws that ruled the inheritance of characters. . His experimentation led him to find out that there is something that without any disturbance is getting passed to the next generation. The new word ‘factor’ came into existence which is now known as a gene. Genes are the functional part of DNA (deoxyribonucleic acid) and possess the required hereditary information. Genes that carry information of opposite characters are called alleles. If an allelic pair is the same they are called homozygous and if they are opposite they are called heterozygous. The expression of a specific trait (phenotype) in a generation depends on the presence of these alleles. The allelic makeup of the pea plant is called genotype and the characteristic they express is called the phenotype. The observation that Mendel made was that in a particular generation some characteristics are masked (covered) as they are inherited by weak alleles called recessive while those alleles who always exhibit their character are called dominant. The cross between various generations is studied with help of a particular diagram called Punnett square.
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