3.2 Flashcards
What is the purpose of a plant field trial?
An investigation to compare different cultivators or treatments
How many variable should be changed in a selection of treatments?
One
How to make an investigation more reliable?
Repeat and average
How do you reduce bias in an plant field trial?
Randomise each plot
What is inbreeding?
Fusion of gametes with close relatives
Why are plants and animals, that are related, bred for many generations?
To eliminate all heterozygous
What is the name for an increase in recessive homozygous alleles that can be deleterious?
Inbreeding depression
What is the purpose of cross breeding?
To introduce new alleles and characteristics
What types of crops are produced between F1 hybrids?
Heterozygous
What are good about being an F1 hybrid bro?
Increased vigour and increased yield
Why are F1 hybrids are never bred together?
Too much variation
What type of crossing is used to work out if an organism is homozygous dominant or heterozygous, since both have dominant phenotypes?
Test crossing
What two ways can genetic technology be used for breeding?
Sequencing of alleles and transformation of genes to one organism to a foreigner
What does the insertion of the BT toxin do to a plant?
Become pest resistant
What does the insertion of the glyphosate gene do?
Allows for herbicide tolerance
