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During crossing-over, the genetic material from homologous chromosomes is swapped. This leads to a recombination of the genes.
Simple example:
Originally - ABCD alleles on one and abcd on the other.
After crossing over - ABCd and abcD
This creates offspring with non-parental phenotypes (traits), which are known as recombinants.
What else can I help you with?
What is Any permanent change in the genetic material is called a?
it is called a mutations
What is the change in phenotype of bacteria caused by the presence of foreign genetic material Also what is a word for disease causing that starts with a v and ends with a t?
change in phenotype of bacteria caused by the presece of foreign genetic material
A change in the genetic material of a cell is called?
Cancer- certain mutations (changes) in a cell's genetic material may cause that cell to reproduce with out control.
A change in the genetic material that produces variation in a species may be the result of?
immigration, mutation and sexual reproduction.
Genetic material must be able to?
it must be able to produce complete working proteins, have the ability to adapt to changes, to reolicate faithfully and they must allow for evolutionary change
When corresponding portions of chromatids on two homologous chromosomes change places what has occured?
This is called genetic recombination or crossing over. It results in the exchange of genetic material between homologous chromosomes during meiosis, leading to genetic diversity in offspring.
Why do you use non-sister chromatids to demonstrate crossing over?
Crossing over occurs between homologous chromosomes, which are not identical, as one member of each pair of homologous chromosomes comes from the mother, and one member comes from the father. Sister chromatids are identical and crossing over would have no effect.
Compare the number of di erent types of chromatids (combinations of A B a and b) before crossing over with the number after crossing over.?
Before crossing over, there are four types of chromatids: AB, Ab, aB, and ab, which represent the combinations of alleles from two homologous chromosomes. After crossing over, the genetic recombination can produce new combinations, resulting in additional types of chromatids. However, the total number of unique chromatids remains the same; it is the combinations that change, leading to a greater diversity of genetic variation among the offspring. Therefore, while the number of different types of chromatids increases due to recombination, the overall number of chromatids remains constant.
If one arm of a chromatid crosses over the arm of another chromatid what results?
A DNA exchange called crossing over occurs, leading to genetic recombination between the chromatids. This increases genetic variability by mixing genetic material between homologous chromosomes during meiosis.
What happends when corresponding portions of chromatids on two homologous chromosomes change places?
crossing over.
What is a change in an organism's genetic material?
A mutation.
What is the permanent change in the genetic material of a cell?
A mutation
What is the definiton of mutation?
A change in the genetic material of an organism.
What genetic material are called mutations?
Sudden genetic change in the DNA of an organism called mutations.
How does meiosis contribute to genetic recombination?
Meiosis is involved in sexual reproduction. It produces gametes (eg. sperm and ovum/egg) which contain half the number of chromosomes of a normal (somatic/non-sex) cell. This means that in order to produce a new organism the gametes from the two different parents must combine. This results in an organism with a combination of the parents' genes (half the chromosomes from one parent, and half from the other). The organism is therefore different to both parents.
What is Any permanent change in the genetic material is called a?
it is called a mutations
Does crossing over affect one or many genes?
Crossing over can effect on more then one gene i.e. at least two as in crossing over the genes of homologus chromatin get interchanged so it effect at least two genes and can effect or change more then two genes depend upon the linking and crossing over capability
