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WorksheetsWarm up
Total questions: 8
Worksheet time: 21mins
What is heritability?
Passing of traits from parents to offspring
The proportion of phenotypic variation in a population explained by genetic variation between individuals
The part of the phenotype explained by the genotype
What is heredity?
Passing of traits from parents to offspring
The proportion of phenotypic variation in a population explained by genetic variation between individuals
The part of the phenotype explained by the genotype
Rice resistance to rust is determined by a single gene with two alleles – a recessive, susceptible, and a dominant, resistant gene. Which breeding technique would you recommend to improve rice resistance to rust?
Mass selection
Controlled crosses + selection of pure bred lines
Hybridization
Wide crosses with wild rice
Mutagenesis
The yield in corn is determined by at least 150 genes, coding for the size and number of grains, the size of the cob, nutritious composition of the grains, etc…. Which breeding technique would you recommend to improve corn yield?
Mass selection
Controlled crosses + selection of pure bred lines
Hybridization
Wide crosses with teosinte
Mutagenesis
The table gives the height measured in 7 plants. Calculate the mean plant height
(a)
The table gives the measurement of height in 7 plants. What is their variance?
85
1889
167
52
If we exclude plants A and G from the calculation, what will happen to the mean height value?
It will increase
It will decrease
It will not change
If we exclude plants A and G from the calculation, what will happen to the variance calculated from the remaining data?
It will increase
It will decrease
It will not change
