Q.Explain haplodiploid sex determination in honeybees. How does the number of chromosome sets an individual develops from determine whether it becomes a fertile queen/worker (female) or a drone (male)?

In honeybees, males are haploid (develop from unfertilised eggs) and females are diploid — sex depends on chromosome-set number.

Honeybees show a haplo-diploid sex-determination system. A fertilised (diploid) egg develops into a female (queen or worker), while an unfertilised (haploid) egg develops parthenogenetically into a male (drone). Thus the sex depends on the number of chromos …

The haplo-diploid sex-determination system is seen in honey bees (order Hymenoptera).

The haplodiploid sex-determination system occurs in honey bees.

In honey bees, sex is determined by the number of chromosome sets rather than sex chromosomes: fertilized diploid eggs develop into females (queens/workers) while unfertilized haploid egg …

In honeybees, sex is determined by haplo-diploidy: an unfertilised egg develops parthenogenetically into a haploid male (drone), while a fertilised (diploid) egg develops into a female (queen or worker).

Honeybees show a special chromosomal mechanism of sex determination called haplo-diploidy, distinct from the XX-XY system seen in humans:

• The queen bee mates once and stores sperm in her spermatheca.
• Fertilised eggs (diploid, 2n, receiving one set of chromosomes from the queen and one from a drone) develop into females - either a fertile queen or a sterile worker, depending on the type of food (royal jelly vs regular food) given to the larva. …

Honeybees show haplodiploidy sex determination: unfertilised eggs develop into haploid males, while fertilised eggs develop into diploid females.

In honeybees, the queen mates only once and stores sperm. Eggs that are fertilised (containing both maternal and paternal chromosome sets) develop into diploid females (queens or workers) with 32 chromosomes. Unfertilised eggs develop parthenogenetically into haploid males (drones) with only 16 chromosomes - the mat …

Honeybees show haplodiploid sex determination: unfertilised eggs give haploid males, fertilised eggs give diploid females.

In honeybees (and many other Hymenoptera), sex is not determined by a pair of sex chromosomes as in humans, but by the number of chromosome sets an individual receives — a mechanism called haplodiploidy. A fertilised egg (formed by fusion of a haploid egg and a haploid sperm) develops, by meiosis-derived diploidy, into a female (queen or worker) with the normal diploid chromosome number, 2n = 32 in honeybees. An unfertilised egg, however, develops by parthenogenesis (without fertilisation) directly from the haploid egg cell into a male (drone), which therefore has only a haploid chromosome number, n = 16 — exactly half that of …

Honeybees show haplodiploidy sex determination: males are haploid (from unfertilised eggs), females are diploid (from fertilised eggs).

In honeybees, sex determination follows the haplodiploid system rather than a chromosomal (XY/ZW) system:

• Fertilised eggs (2n, receiving one set of chromosomes from each parent) develop into diploid females (queens or worker bees). …

Honeybee — its male drones arise from unfertilised eggs, i.e. by parthenogenesis.

Concept. Parthenogenesis is the development of a new individual from an unfertilised egg (without fertilisation).

Why honeybee. In the honeybee, the queen lays two kinds of eggs. Fertilised (diploid) eggs develop into females (queen/workers), while unfertilised (haploid) eggs develop into male drones by parthenogenesis. This is also the basis of the haplo-di …

Honeybee sex is determined by haplodiploidy: males develop from unfertilized eggs by parthenogenesis.

In the honeybee (Apis), sex determination does not follow the XX/XY system used by humans. Instead:

• Fertilized eggs (diploid, 2n = 32 chromosomes, having received a set from both the queen and a drone) develop into females (queens or worker bees).
• Unfertilized eggs (haploid, n = 16 chromosomes, from the queen alone) develop into males (drones) without ever being fertilized — a process called parthenogenesis. …