Non mendelian inheritance
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Transcript of Non mendelian inheritance
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Non Mendelian Inheritance
Detablan, SherenMangilit, Michaella Kristiane
AAPD2B
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Non Mendelian Inheritance
A general term that refers to any pattern of inheritance in which traits do not segregate in accordance with Mendel’s laws.
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Incomplete Dominance
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A form of intermediate inheritance in which one allele for a specific trait is not completely dominant over the other allele. This results in a combined phenotype.
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INC
OM
PLE
TE D
OM
INA
NC
E A cross pollination between red and white snap dragon plants
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Co-Dominance
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A cross between organisms with two different phenotypes produces offspring with a third phenotype in which both of the parental traits appear together.
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CO
-DO
MIN
AN
CE Co-dominance in roan cattle color: white, redand mixed
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Multiple Allelism
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A set of three or more alleles, or alternative states of a gene, only two of which can be present in a diploid organism.
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MU
LTIP
LE A
LLELIS
M The ABO blood group
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Other Non Mendelian Genetics
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Maternal Effect
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The genotype of mother directly determines phenotype of offspring. Explained by the accumulation of gene products mother provides to developing eggs
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MATER
NA
;L EFFE
CT Dextral (D) is dominant to sinistral (d)
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Epigenetic Inheritance
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Modification occurs to a nuclear gene or chromosome. This occurs during spermatogenesis, oogenesis, and early stages of embryogenesis
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Types of Epigentic Inheritance
Dosage Compensation: Males and females of many species have different numbers of certain sex chromosomes
Genomic Imprinting: involves the physical marking of a segment of DNA
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TYPES
OF E
PIG
EN
ETIC
IN
HER
ITAN
CE
Right: Dosage Compensation; Left: Genomic Imprinting
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Extranuclear Inheritance
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The transmission of genes that occur outside the nucleus. It is found in most eukaryotes and is commonly known to occur in cytoplasmic organelles such as mitochondria and chloroplasts or from cellular parasites like viruses or bacteria
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EX
TR
AN
UC
LEA
R IN
HER
ITAN
CE Pigmentation of Mirabilis jarapa
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End