Genetic Variation During Meiosis quiz #5 Flashcards
Genetic Variation During Meiosis quiz #5
You can tap to flip the card.
Control buttons has been changed to "navigation" mode.
1/24Skip to main content
Which of the following is true of crossing over? A) It occurs during mitosis B) It results in identical chromatids C) It increases genetic diversity
C) It increases genetic diversity Why are no two gametes exactly alike genetically?
No two gametes are exactly alike genetically due to crossing over and independent assortment during meiosis. Which set of chromosomes were produced as the result of crossing-over?
Recombinant chromosomes with new allele combinations are produced as the result of crossing-over. Which process(es) in meiosis results in increased genetic variation?
Crossing over and independent assortment result in increased genetic variation. Which of the following occurs in the process called crossing over? A) Exchange of genetic material B) No change in genetic material C) Formation of identical chromatids
A) Exchange of genetic material What is crossing over? How does it contribute to genetic variety?
Crossing over is the exchange of genetic material between homologous chromosomes, contributing to genetic variety by creating new allele combinations. What results from the process of crossing-over during prophase I?
The result of crossing-over during prophase I is the formation of recombinant chromosomes with new allele combinations. Why does cross-over during prophase I of meiosis increase diversity?
Cross-over during prophase I increases diversity by creating new combinations of alleles on chromosomes. Why is crossing over in meiosis important?
Crossing over in meiosis is important because it increases genetic diversity by creating new combinations of alleles on chromosomes. What produces genetically unique daughter cells?
Meiosis, through crossing over and independent assortment, produces genetically unique daughter cells. What is the result of crossing over during meiosis?
The result of crossing over during meiosis is the formation of recombinant chromosomes with new allele combinations. What is the impact of crossing over on genetic recombination?
The impact of crossing over on genetic recombination is increased genetic diversity through the creation of new allele combinations. Which best describes how crossing over increases genetic diversity?
Crossing over increases genetic diversity by exchanging genetic material between homologous chromosomes, resulting in new allele combinations. What does crossing over result in?
Crossing over results in recombinant chromosomes with new combinations of alleles. How does meiosis generate genetic diversity?
Meiosis generates genetic diversity through crossing over and independent assortment, creating new combinations of alleles. Meiosis produces genetic variation among gametes by way of which of the following events? A) Mitosis B) Crossing over C) Identical chromosome replication
B) Crossing over What are the two main processes during meiosis that generate genetic variation?
The two main processes are crossing over during prophase 1 and independent assortment during metaphase 1. What is synapsis, and what role does it play in meiosis?
Synapsis is the alignment of homologous chromosomes at similar alleles, facilitating crossing over. How does independent assortment contribute to genetic diversity?
Independent assortment allows homologous chromosome pairs to align randomly during metaphase 1, creating numerous genetic combinations. What is nondisjunction, and what are its potential consequences during meiosis?
Nondisjunction is the failure of chromosomes or sister chromatids to separate properly, leading to aneuploid cells with too many or too few chromosomes. Describe how Down syndrome (trisomy 21) is related to errors in meiosis.
Down syndrome is caused by nondisjunction leading to three copies of chromosome 21 (trisomy 21) in a cell. Why does meiosis produce four genetically unique haploid cells?
Meiosis produces four genetically unique haploid cells due to crossing over and independent assortment, which shuffle genetic material. What is the difference between errors occurring in meiosis 1 versus meiosis 2 regarding nondisjunction?
Nondisjunction in meiosis 1 involves homologous chromosomes failing to separate, while in meiosis 2 it involves sister chromatids failing to separate. How does crossing over increase genetic variation beyond what is produced by independent assortment alone?
Crossing over exchanges genetic material between homologous chromosomes, creating new allele combinations not possible through independent assortment alone.
07:08
