How many homologous chromosomes are present in drosophila?

How many homologous chromosomes are present in drosophila?

four homologous pairs
Drosophila has four homologous pairs of chromosomes.

How many chromosomes does a male drosophila have?

By contrast, males are identified as having one X chromosome and one (much smaller) Y chromosome. While drosophila only have a total of 4 chromosomes, they too display sexual dimorphism, with females carrying the double X chromosomes and males carrying XY.

What is the chromosome number of drosophila?

melanogaster contain eight chromosomes (2n=8) that can be seen most easily in squash preparations of the third instar larval CNS (see Fig. 1 ). The autosomal complement consists of two pairs of large metacentric chromosomes, designated 2 and 3, and a pair of tiny, spherical fourth chromosomes.

What are the chromosomes of Drosophila male and female?

In Drosophila melanogaster, most cells make this choice independent of their neighbors such that diploid cells with one X chromosome (XY) are male and those with two X chromosomes (XX) are female. X-chromosome number is relayed through regulatory proteins that act together to activate Sex-lethal (Sxl) in XX animals.

How many homologous pairs are found in Drosophila?

– Drosophila just has four homologous pairs of chromosomes in which three are autosomes and one pair of sex chromosomes. – X chromosome is responsible for the eye color in Drosophila.

How many homologous pairs does a fruit fly have?

How many pairs of chromosomes does a fruit fly have? The Drosophila melanogaster is the most well known of fruit flies. It has four chromosomal pairs: one that determines sex and three autosomal chromosomes. Each chromosome has two arms, referred to as the left and the right.

How many linkage groups are present in male Drosophila?

5 linkage groups
Correct answer is “5” The number of linkage groups present in an individual corresponds to the number of chromosomes in its one genome. There are not 4 but actually 5 linkage groups in male Drosophila.

How many chromosomes does a housefly have?

12
In housefly, the number of chromosomes in a somatic cell is 12. Therefore, meiocytes also possess 12 chromosomes.

How many pairs of chromosomes does a Drosophila fly have?

In Drosophila melanogaster there are 4 homologous pairs of chromosomes: 2 pairs of large autosomes, ( one slightly smaller than the other pair), 1 pair of very small autosomes, and a pair of sex chromosomes ( X, Y ). Inheritance of eye colour in Drosophila is X- chromosome-linked. The eye colour gene is present on the X-chromosome.

Which is the karyotype of Drosophila melanogaster?

THE basic karyotype of Drosophila melanogaster, which can be seen in mitotically active neuroblasts of the larval brain, is comprised by four chromosomes, the X and Y sex chromosomes, two larger autosomal elements, chromosomes 2 and 3, and the small dot fourth chromosome (Figure 1) (Metz 1914; Deng et al. 2007).

How many different chromosome combinations can be found in male gametes?

Drosophila melanogaster has 4 pairs of chromosomes. It is known that in drosophila recombination does not occur in males. How many different chromosome combinations can be found in male gametes? – Quora Drosophila melanogaster has 4 pairs of chromosomes. It is known that in drosophila recombination does not occur in males.

Which is the fourth chromosome in D melanogaster?

Photomicrographic and diagrammatic representation of the heterochromatic elements of D. melanogaster. The photomicrographs show male larval neuroblasts stained with Hoechst. The brightly fluorescent dots are the fourth chromosome and the longer bright chromosome the Y.