Question

Dogs have $78$ Chromosomes in their diploid cells. How many Chromosomes are in their haploid cells?

Answer 1

Chromosomes are present inside the nucleus. It is like a thread. Present in both plant and animal cells. Chromosomes have protein. In fact it is made up of protein and a one deoxyribonucleic acid (DNA) which transfers from parent to its duplication. DNA has a special character and it has self-replication quality.

Complete answer:
• Dogs have 78 Chromosomes in their diploid cells. In simply diploid cells (2n) means two sets of chromosomes are there in the cell. Haploid (n) cells mean only one cell is present.
• In Dogs, $\dfrac{{2n}}{n} = \dfrac{{78}}{2} = 39$ Haploid chromosomes are present in dogs.
• In details, at the time of meiosis, in the equator line $78$ chromosomes present at the equator of the cells in this region the chromosomes are already replicated.
• The haploid cells contain $39$ chromosomes.
• There is a difference between Anaphase in Mitosis and Meiosis I.
• Here centromere will not divide, so the sister chromatids are present together without splitting.

Hence $39$ chromosomes are present at the poles of the cells.
Then the number of chromosomes is decreased by $2n$ to $n$. Then the cells undergo Meiosis II provide the 4 haploid daughter cells with exactly half of the chromosome number of the parent cell.

Note: Diploid cells have two sets of chromosomes. The deviation is in the cells in the gremlin. This generates gametes or sperm.
Haploid means it has only one set of chromosomes. In human $23$ chromosomes are present. $23$Diploid $\left( {2n} \right)$ cells and $12\left( n \right)$ haploid cells are present in the human body.
Mainly chromosomes are of four types : Metacentric, Acrocentric, Telocentric, Sub metacentric chromosomes. Linear chromosomes are present in eukaryotes.