If yellow chromosomes are inherited from the maternal parent and red chromosomes from the paternal parent, what is the genetic constitution of the daughter cells ?
The correct answer and explanation is:
In this scenario, where yellow chromosomes are inherited from the maternal parent and red chromosomes from the paternal parent, the genetic constitution of the daughter cells can be determined based on the process of cell division, specifically meiosis.
During meiosis, the process of sexual reproduction, the chromosomes from both parents are segregated and recombined to form new combinations of genetic material. For this example, let’s assume the yellow chromosomes are designated as “Y” and the red chromosomes as “R.” Each parent contributes one chromosome of each color to the offspring.
In the first stage of meiosis, the homologous chromosomes (one yellow and one red chromosome from each parent) pair up. In the second phase, known as anaphase I, these homologous chromosomes are separated, with one set of chromosomes (yellow and red) moving toward one daughter cell, while the other set moves toward the opposite daughter cell.
Following this, meiosis continues into the second division (meiosis II), which is similar to mitosis. During this phase, the sister chromatids of each chromosome are separated. The resulting daughter cells each contain a single chromosome from each parent. Therefore, each daughter cell will have either a yellow chromosome or a red chromosome, but not both.
The genetic constitution of the daughter cells will be as follows:
- Each daughter cell will contain a single chromosome from the maternal parent (yellow or Y) and a single chromosome from the paternal parent (red or R).
- If the parent contributes multiple chromosomes (in diploid organisms), there will be various possible combinations of yellow and red chromosomes in the daughter cells, but each daughter cell will have one chromosome from each parent.
In conclusion, the daughter cells will have a genetic constitution of one chromosome inherited from the maternal (yellow) and one from the paternal (red) parent, representing a mix of the two genetic sources.