Search results
Results from the WOW.Com Content Network
The Punnett squareis a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach in 1905. [3][4][5][6][7][8]The diagram is used by biologiststo determine the probabilityof an offspring having a particular genotype.
Reginald Punnett was born in 1875 in the town of Tonbridge in Kent, England. While recovering from a childhood bout of appendicitis, Punnett became acquainted with Jardine's Naturalist's Library and developed an interest in natural history.
e. Mendelian inheritance (also known as Mendelism) is a type of biological inheritance following the principles originally proposed by Gregor Mendel in 1865 and 1866, re-discovered in 1900 by Hugo de Vries and Carl Correns, and later popularized by William Bateson. [1] These principles were initially controversial.
Test cross types. A test cross involves crossing an individual organism with a dominant genotype or phenotype with another organism exhibiting a recessive genotype or phenotype. To better grasp the concept of test crossing, let's explore various types of crosses involving one or more genes of interest.
Punnett square for three-allele case (left) and four-allele case (right). White areas are homozygotes. Colored areas are heterozygotes. Consider an extra allele frequency, r. The two-allele case is the binomial expansion of (p + q) 2, and thus the three-allele case is the trinomial expansion of (p + q + r) 2.
In population genetics, the genotype frequency is the frequency or proportion (i.e., 0 < f < 1) of genotypes in a population. Although allele and genotype frequencies are related, it is important to clearly distinguish them. Genotype frequency may also be used in the future (for "genomic profiling") to predict someone's having a disease [3] or ...
The genotype of an organism is its complete set of genetic material. [ 1 ] Genotype can also be used to refer to the alleles or variants an individual carries in a particular gene or genetic location. [ 2 ] The number of alleles an individual can have in a specific gene depends on the number of copies of each chromosome found in that species ...
This is a Punnett square for Rh factor inheritance. This square specifically shows two heterozygous Rh positive parents and the possible genotypes/phenotypes the offspring could have. The D antigen is inherited as one gene (on the short arm of the first chromosome, p36.13–p34.3) with various alleles. Typically, Rhesus positive people have an ...