Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: Advantages of polyploidy in Agriculture
Description: These types of plants produce large fruits and withstand droughts and floods.
Description: These types of plants produce large fruits and withstand droughts and floods.
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
Polyploidy
and biotechnology and its advantages in agriculture such as the production of
larger flowers, fruits and storage organs
and meiosis with respect to:
Where each process occurs
The purpose of each type of cell division
Similarities and differences
Mitosis
Introduction
Genetics is the study of heredity and the variations that occur in the transmission of
hereditary characteristics
...
– for each characteristic, a plant possesses two “factors”
(known as genes) which separate or segregate so that each gamete contains only
one of these factors
...
Alleles as genes controlling the same characteristic, example eye colour
Alleles are two genes, occupying identical positions on a pair of homologous
chromosomes, and controlling the same characteristic, but in different ways
...
Recessive genes are genes whose characteristics only show up in homozygous
combination
...
Phenotype and genotype
A phenotype is the external appearance of an organism
...
Homozygous (pure-bred) and heterozygous (hybrid)
A homozygous is an individual which has similar genes for a particular
characteristics
...
Complete dominance
Is a blending effect in a trait when both alleles are equally dominant e
...
tongue
rolling
Incomplete/partial dominance
Is a blending effect in a trait when neither allele in a hybrid is dominant e
...
pink
snapdragons, sickle cell anaemia
Co-dominance
Is when two different alleles in a pair are both expressed in the phenotype and the
individual has the characteristics coded by both alleles e
...
blood groups
Multiple alleles
Are more than two alleles for the same gene e
...
blood groups
Polygenic inheritance
Is a trait controlled by the alleles of two or more genes e
...
skin colour, height
Sex-linked characteristics
Are inherited conditions found either in male or females e
...
haemophilia, colour
blindness
Karyotype
Is the number and structure of the chromosomes in the nucleus of the cell
...
Genetic modification
Is the total number of genetic characteristics in the genetic makeup of a species
...
Difference between gene mutation and chromosomal aberration
Gene mutations are changes in the DNA structure while chromosomal aberrations
are changes in the chromosome structure or in the number of chromosomes in a
homologous pair
Title: Advantages of polyploidy in Agriculture
Description: These types of plants produce large fruits and withstand droughts and floods.
Description: These types of plants produce large fruits and withstand droughts and floods.