What is a true chromosome?
A chromosome is made from tightly packed strands of DNA and a huge number of proteins called histones. True chromosomes are found only in eukaryotic cells. Prokaryotic cells contain much less DNA which is packaged with proteins but not into ‘true’ chromosomes. Human cells contain 46 chromosomes.
Which of the following is true about the chromatids?
4. Which of the following is true about the Chromatids? Sol: (d) It is one-half of the replicated chromosome.
What are the two types of chromatids?
Chromatids may be sister or non-sister chromatids.
Which of the following statements is true about chromosomes?
Answer: c) it is composed of DNA in the form of protein and chromatin.
What is chromosomal theory of inheritance and who proposed it?
The chromosomal theory of inheritance was proposed by Sutton and Boveri in 1903 which states that genes are present on chromosomes and homologous chromosomes separate during anaphase-I of meiosis resulting in segregation of alleles of a gene controlling the contrasting traits.
Which of the following statement is true about the chromatin composition?
Which of the following statements is true about the chromatin composition? Sol: (d) DNA, RNA and proteins.
Which of the following is not true in case of chromosomal theory of inheritance?
Explanation: The chromosomal theory of inheritance violated none of Mendel’s laws as the only difference was the genes being present in the chromosome, other than that the laws are as they were. Explanation: If the gene has a sex bias it is certainly sex linked. … Explanation: Eye colour is a sex linked trait.
How does one chromatid compare to its sister chromatid?
One chromatid compares to its sister chromatid because when a chromatid is replicated, a sister chromatid is formed. The sister chromatid will be a genetically identical copy to the chromatid because the cell being replicated will also be genetically identical.
What Sister chromatid did during metaphase?
During metaphase, the cell’s chromosomes align themselves in the middle of the cell through a type of cellular “tug of war.” The chromosomes, which have been replicated and remain joined at a central point called the centromere, are called sister chromatids.
What causes chromatid separation?
Metaphase leads to anaphase, during which each chromosome’s sister chromatids separate and move to opposite poles of the cell. Enzymatic breakdown of cohesin — which linked the sister chromatids together during prophase — causes this separation to occur.