The genetic variation part: During Prophase I of Meiosis I, a unique event occurs, called “crossing over”. The replicated homologous pairs of chromosomes join together during “synapsis”. … The end result includes chromosomes with genes from both parents, which increases genetic variation.
How does crossing over during meiosis contribute to genetic variation quizlet?
How does crossing over contribute to genetic diversity? Maternal and paternal genes come together. Crossing over may occur between so it will create a different and unique combination that is different form the parents. So this will increase the genetic diversity.
How does meiosis one contribute to genetic variation?
During prophase of meiosis I, the double-chromatid homologous pairs of chromosomes cross over with each other and often exchange chromosome segments. This recombination creates genetic diversity by allowing genes from each parent to intermix, resulting in chromosomes with a different genetic complement.
What are the 3 events in meiosis that contribute to genetic variation?
We have seen that meiosis creates variation three ways: crossing over, mutations caused during crossing over, and independent assortment.
Which cell is normally produced as a direct result of meiosis?
Meiosis results in the formation of four haploid cells which can act as gametes. The male gamete is the sperm and the female gamete is the ovum. These gametes possess only half the set of the chromosomes.
Which pair of events contribute to genetic variation every time a gamete forms by meiosis?
It occurs during the crossing over process in prophase 1 of meiosis. Here, homologous chromosomes pair up and exchange random genetic information for variation.
Why offspring are not exact replicas of their parents?
In sexual reproduction one full set of the genes come from each parent. Living things produce offspring of the same species, but in many cases offspring are not identical with each other or with their parents. … Changes in genes can be caused by environmental conditions, such as radiation and chemicals.
Which of the following best describes how meiosis contributes to genetic variation?
The replicated homologous pairs of chromosomes join together during “synapsis“. Here, sections of chromosomes are exchanged. The end result includes chromosomes with genes from both parents, which increases genetic variation. The process of synapsis and crossing over only occurs in sexual reproduction (meiosis).