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How many combinations of alleles could there be in zygotes produced by crossing the following parents TT x Tt?
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What results in the exchange of allels and produced new combinations of alleles?
Crossing-over
Which of the following creates new combinations of alleles along one chromosome?
Crossing Over
How can new combinations of alleles be created when genes are linked?
New combinations of alleles can be created when genes are linked through a process called crossing over during meiosis. Crossing over occurs when homologous chromosomes exchange genetic material, resulting in the mixing of alleles between the two chromosomes. This process leads to the creation of new combinations of alleles and contributes to genetic variation in the population.
What results in the exchange of alleles and produces now combinations of alleles?
Crossing over during prophase I of meiosis.
The new combinations of alleles produced by crossover events help to generate genetic?
The new combination of alleles produced by crossover events help to generate genetic diversity. This is because the offspring are different from the parents.
Why do gametes have different combinations of alleles?
Crossing over and random alignment of chromosomes
What is meant by 'scrambling of allelic combinations?
Recombination, or crossing over, is the exchanging of DNA between homologous chromosomes at meiosis. It results in novel combinations of alleles in the gametes, that is, it scrambles the alleles into new combinations, Let's take an example of an individual that has genes A,B and C on one chromsome, and has the alleles a and c on the other chromosome of the pair: A---B---C a---B---c If crossing over occurs between the genes A and B (and not between B and C), then we can get the following genotypes in the gametes, in addition to the above two combinations: : A---B---c a---B---C Crossing over has scrambled the allelic combinations and given us two new additional ones in the gametes. If we allow recombination between B and C, then even more combinations are possible. One can easily see how recombination can add enormous amounts of genetic variation into a population. Also, note that if no recombination occurs, only the two original combinations of alleles will make it into the gametes.
Does sexual reproduction create new alleles or new combinations of alleles?
new combinations of alleles
What stage new allelic combinations might form?
During the final stage of meiosis, alleles may form new combinations. This is known as crossing-over or meiotic recombination.
How does meiosis accounts for recombinant phenotypes?
recombinants are formed in prophase I because that is when crossing over occurs. Crossing over brings the alleles together into new combinations, switching two traits but not all of them. Then in the following steps of meiosis the recombinants are distributed into different gametes, resulting into recombinant phenotypes.
Which does sexual reproduction create new allels or new combinations of alleles?
new combinations of alleles
During meiosis the process of crossing over results in new combinations of alleles because?
genetic material is exchanged between chromosomes during this process.
