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If the F1 generation is further paired among itself by a yet another monohybrid cross than an F2 generation of plants will be produced. The expected phenotype of F2 generation would be 75% tall plants and 25% short plants. In F2 generation 25% of plants would be tall but would be homozygous for their trait of tallness. Another 50% of plants would also be tall but would be heterozygous for their trait of tallness while the remaining 25% of would be short and would be recessive for their trait.
Dihybrid cross: A dihybrid cross is a cross between two individuals that involves two pairs of contrasting characteristics. If two plants that are pure bred (homozygous) for two contrasting traits for example one plant that is tall and produce yellow seeds (both dominant traits) and the other plant that is short and produces green seeds (both recessive traits) are crossed with other, than the F1 generation produced would be all heterozygous for both characteristics. But only dominant trait would appear in the phenotype of F1 generation and all plants of this generation would appear tall and would produce yellow seeds. If the members of this F1 generation are further crossed with each other than an F2 generation would produced which would have different types of plants: tall plants producing yellow seeds, tall plants producing green seeds, short plants producing yellow seeds, short plants producing green seeds in a ratio of 9:3:3:1
b) If a boar that is homozygous for lop ears and spotted skin is sow that is homozygous for pricked ears and unspotted skin than the F1 generation produced will all have pricked ear and spotted skin, as these two traits are dominant. The genotype of F1 generation would be PpSs. (Key: P= pricked ears, p=lop ears, S=spotted skin, s-unspotted skin). However the phenotype and genotype of F2 generation produced is shown as follows
The Punnett Square
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Generally, if there is a heritable factor, then the cancer will occur earlier in life than a sporadic condition. However, it is important to note that people do not inherit breast cancer, but rather an increased likelihood of having the disease . Around 20 – 30% of women who have breast cancer have the disease occurring within their family, however there are also many environmental risk factors, such as use of alcohol or exposure to radiation .
This is a discussion on the issues dealing with behaviour genetics and ethics that has been a major part of the news in recent months. Several areas of the arguments would deal with the genetics and behavioural changes, whether behaviour is species specific, whether behavioural changes relate to changes in biological structures and processes and the evolutionary history or DNA sequencing that are related to behavioural genetics.
In order for such a procedure to be done, two RAD51 targeting constructs that contained either neomycin or blasticidin first had to be prepared. Once these targeting constructs were prepared, the RAD51 neo constructs were transpected into DT40 cells, and heterozygous clones were isolated for the RAD51 gene.
Here a gene could be cut into small fragments, and a fragment from another gene having a different make up, can be inserted between the cut fragments, and then reattached together to form a completely new gene. There are many
The questions are undertaken based on credible experiments.
The probability of the parents getting 10 children where 3 that are normal for both traits, 3 that have iron overload, but normal blood calcium and 4 that exhibit both iron overload and
Each gene codes for a specific protein in the body by specifying the order that the amino acids needs to be joined together. The function of the DNA in the body is carrying genetic code of information that determines the characteristics of a living thing but it is
If you fertilize a trisomic Jimson weed plant, what zygotes would be formed? Tell which zygotes are diploid and which are trisomic. Assume that only the univalent mode occurs during meiosis;
2. Down syndrome can result from a Robertsonian
single “composite” cell of higher complexity “evolved from more separate simpler cells living in a symbiotic relationship with one another” (Karp, 2009, p.25). The evolution of eukaryotic cells begins in step 1; a large anaerobic which is heterotrophic prokaryote taking
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