What aspect of meiosis best explains Mendel’s law of segregation?
Which of these descriptions of the behavior of chromosomes during meiosis explains Mendel’s law of segregation? The two alleles for each gene separate as homologous chromosomes move apart during anaphase I. Imagine a human disorder that is inherited as a dominant, X-linked trait.
How does chromosomal behavior in meiosis relate to Mendel’s law of segregation?
In essence, the law states that copies of genes separate or segregate so that each gamete receives only one allele. … The behavior of homologous chromosomes during meiosis can account for the segregation of the alleles at each genetic locus to different gametes.
Which stage of meiosis explains Mendel’s law of segregation?
“Mendel’s Law of Segregation can be seen in Anaphase I. Mendel’s law of independent assortment can be seen in Prophase I (pachytene substage).
What two conclusions make up Mendel’s law of segregation?
What two conclusions make up Mendel’s law of segregation? Organisms inherit two copies of each gene, one from each parent. Genes segregate during gamete formation, so organisms donate only one copy of each gene in their gametes.
What is Mendel’s first law of segregation?
1 Character Traits Exist in Pairs that Segregate at Meiosis. … This is the basis of Mendel’s First Law, also called The Law of Equal Segregation, which states: during gamete formation, the two alleles at a gene locus segregate from each other; each gamete has an equal probability of containing either allele.
How did Mendel prove segregation?
Mendel proposed the Law of Segregation after observing that pea plants with two different traits produced offspring that all expressed the dominant trait, but the following generation expressed the dominant and recessive traits in a 3:1 ratio.
What are the 3 laws of inheritance?
The Mendel’s laws of inheritance include law of dominance, law of segregation and law of independent assortment.
What is Mendel’s second law?
Mendel’s Second Law – the law of independent assortment; during gamete formation the segregation of the alleles of one allelic pair is independent of the segregation of the alleles of another allelic pair.
What is the Law of Independent Assortment?
The Principle of Independent Assortment describes how different genes independently separate from one another when reproductive cells develop. Independent assortment of genes and their corresponding traits was first observed by Gregor Mendel in 1865 during his studies of genetics in pea plants.
What is law of segregation with example?
For example, the gene for seed color in pea plants exists in two forms. There is one form or allele for yellow seed color (Y) and another for green seed color (y). … When the alleles of a pair are different (heterozygous), the dominant allele trait is expressed, and the recessive allele trait is masked.
What is the principle of segregation?
The Principle of Segregation describes how pairs of gene variants are separated into reproductive cells. The segregation of gene variants, called alleles, and their corresponding traits was first observed by Gregor Mendel in 1865. From his data, Mendel formulated the Principle of Segregation. …
Which best describes the Law of Independent Assortment?
The Law of Independent Assortment states that different genes and their alleles are inherited independently within sexually reproducing organisms. During meiosis, chromosomes are separated into multiple gametes.
In which generation of offspring did Mendel observe a 3 1 ratio in the appearance of the offspring?
In cross-pollinating plants that either produce yellow or green pea seeds exclusively, Mendel found that the first offspring generation (f1) always has yellow seeds. However, the following generation (f2) consistently has a 3:1 ratio of yellow to green. This 3:1 ratio occurs in later generations as well.
What’s the difference between Monohybrid and Dihybrid crosses?
They are monohybrid and dihybrid. … A monohybrid cross is defined as the cross happening in the F1 generation offspring of parents differing in one trait only. A dihybrid cross is a cross happens F1 generation offspring of differing in two traits.