CELL DIVISION
MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Only one of a pair of alleles appears in a gamete.
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The separation of “paternal” and “maternal” chromosomes shows no pattern.
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Gametes contain all dominant or all recessive alleles.
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Variation only results from two divisions.
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Detailed explanation-1: -Law of segregation is the second law of inheritance. This law explains that the pair of alleles segregate from each other during meiosis cell division (gamete formation) so that only one allele will be present in each gamete.
Detailed explanation-2: -In Mendel’s experiments, the segregation and the independent assortment during meiosis in the F1 generation give rise to the F2 phenotypic ratios observed by Mendel. The role of the meiotic segregation of chromosomes in sexual reproduction was not understood by the scientific community during Mendel’s lifetime.
Detailed explanation-3: -The physical basis of Mendel’s law of segregation is the first division of meiosis, in which the homologous chromosomes with their different versions of each gene are segregated into daughter nuclei.
Detailed explanation-4: -The law of segregation states that the parental genes must separate randomly and equally into gametes during meiosis so there is an equal chance of the offspring inheriting either allele.
Detailed explanation-5: -The separation of homologous chromosomes during anaphase I of meiosis is the physical basis for the law of segregation. While the alternative arrangements of the homologous chromosomes pairs during metaphase I is the physical basis for the law of independent assortment.