Consider these three chromosome drawings. Locations of different genes are shown
ID: 37212 • Letter: C
Question
Consider these three chromosome drawings. Locations of different genes are shown by letters. Upper and lower case represent different alleles of a gene.
1. Which of these drawings illustrate non-sister chromatids of homologous chromosomes?Select all that apply.
2. Which of these drawings illustrate non-homologous chromosomes? Select all that apply.
3. Which of these drawings illustrate sister chromatids?Select all that apply.
4. Which of these drawings illustrate chromosomes that could cross over during Meiosis I?Select all that
apply.
Consider these three chromosome drawings. Locations of different genes are shown by letters. Upper and lower case represent different alleles of a gene. 1. Which of these drawings illustrate non-sister chromatids of homologous chromosomes?Select all that apply. 2. Which of these drawings illustrate non-homologous chromosomes? Select all that apply. 3. Which of these drawings illustrate sister chromatids?Select all that apply. 4. Which of these drawings illustrate chromosomes that could cross over during Meiosis I?Select all that apply.Explanation / Answer
Ans.
A couple of homologous chromosomes,
are a Set of One Maternal chromosome and One Paternal chromosome that pair up with each other inside a cell during meiosis.
These copies have the Same Genes in the same locations, or Loci.
Image A = Homologous Chromosomes.
A Sister Chromatid is either of the two Chromatids of the Same Chromosome joined together by a common centromere.
A Non-Sister Chromatid on the other hand, refers to either of the two chromatids of any of the Paired Homologous Chromosomes.
Ans. 1 = Images A and B (non-sister chromatids of Homologous Chromosomes)
Ans. 2 = Image C (Non- Homologous Chromosomes)
Ans. 3 = Image A (Sister Chromatid)
Ans. 4 = Images A and B (crossing over = Possible only incase of Homologous Chromosomes)