Uploaded by Vebwaps0129

report-in-bio

advertisement
JARED GABRIEL V. ORTIZ
 A gene is a unit of hereditary information. Except in
some viruses, genes are made up of DNA, a complex
molecule that codes genetic information for the
transmission of inherited traits.
 Alleles are also genetic sequences, and they too code
for the transmission of traits.
 When the copies of a gene differ from each other,
they are known as alleles.
Novel Phenotypes
 A novel phenotype is a new or different feature (trait)
of an organism. These traits come from the different
ways genes combine and interact with each other in a
process called epistasis. Some examples of epistasis are
the shape of chicken’s combs, wheat kernel colors, and
coat colors in horses.
Recessive Epistasis
 In recessive epistasis, Gene A is recessive. (A recessive
gene is one that is masked by a dominant gene; that is,
it will only express if there are two copies of the
recessive allele.) Thus, we need two copies of the
recessive allele at Gene A for it to override Gene B.
Dominant Epistasis
 Dominant epistasis happens when the dominant
allele of one gene masks the expression of all alleles of
another gene. If an organism inherits one or two
copies of the dominant allele, they will have the trait.
Complementary Genes
 Complementary genes are genes that both contribute
to a single characteristic, where both genes can mask
the effect of the other. You may also think of
complementary genes as any instance in which
dominant forms of both genes are required for the
dominant characteristic to be seen.
Duplicated Genes
 Each of the different types of keratin found
throughout the body are expressed by different genes
that are duplicates of each other. Gene duplication
happens when an extra copy of a gene is made in an
organism's genome.
Reference:
 https://www.nature.com/scitable/topicpage/epistasis



gene-interaction-and-phenotype-effects-460
https://www.britannica.com/science/epistatic-gene
https://learn.genetics.utah.edu/content/pigeons/epist
asis/
https://www.ndsu.edu/pubweb/~mcclean/plsc431/me
ndel/mendel6.htm
https://bio.libretexts.org/Bookshelves/Genetics/Book
%3A_Online_Open_Genetics_(Nickle_and_BarretteNg)/06%3A_Genetic_Analysis_of_Multiple_Genes/6.2
%3A_Epistasis_and_Other_Gene_Interactions
Download
Related flashcards
RNA

17 Cards

RNA

23 Cards

Create flashcards