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Quantitave Differences
Inheritance of quantitative differences in plants
10
Biology
Undergraduate 1
12/17/2010

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Term
the Law of Segregation
Definition

-two alleles for the gene of interesre passed individually to the next generation through the egg and sperm

 

-(Ss or Yy alleles segregate into S or s or Y or y)

Term
the Law of Independent Assortment
Definition
The gametes formed by alleles is completely by chance;
Term
Linkage
Definition

the proximaty of two genes on one chromosome;

-crossing over = infrequent, then genes must be close

-If crossing over is frequent, genes must be far apart.

-If gametes all have equal frequency, then genes are on different chromosomes.

Term
quantitative traits
Definition

'small differences' (seed yield, sugar, etc.);

influenced more by environment

Term
Equation summarizing trait change
Definition
Phenotype=Genotype + environment
Term
frequency equation:
Definition
dividing the number of plants with X trait by the total number of plants in the population
Term
Frequency graph if X is a quantitative trait?
Definition

More dispersial; not one main peak

-due to influence of environment; it is larger on quantitative traits

Term
Frequency graph if X is qualitative trait?
Definition
One large peak; most plants will inherit one trait; little influence by enviornment
Term

High heritiability

 

Definition

you can predict the offspring's performance based on the performance of the parent;

Genes are passed from parent to offspring (high flower yield in parent=high flower yield in child)

Term
Low heritability
Definition

there is no line of good fit;

performance of parent has nothing to do w/ child's

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