The significant genetic characteristics of fruit flies include: *
a diploid number (2n) of 8 chromosomes, and 4 haploid (n) chromosomes
; linkage is detected whenever 5 or more genes are studied because with a haploid number of 4 chromosomes, 2 of any 5 genes studied must be on the same chromosome.
What is the diploid number for fruit flies?
› The diploid number of chromosomes is sometimes represented by the symbol ____________. Page 2 › For the fruit fly, the diploid number is
8
, which can be written as 2N = 8, where ___________ represents twice the number of chromosomes in a sperm or egg cell.
What is the fruit fly’s haploid number?
For fruit fly gametes, the haploid number is
4
, which can be written as N = 4.
How many chromosomes does a fruit fly diploid cell have?
A fruit fly has diploid cells with
8 chromosomes
.
How many diploid and haploid cells do fruit flies have?
The diploid number for fruit flies is
8
, while that for grasshoppers is 46.
How many chromosomes does a fruit fly have after mitosis?
Fruit fly body cells have
8 chromosomes
. After mitosis, you would expect a resulting fruit fly daughter cell to have …
How many types of gametes can a female fly?
By the principle of segregation, he made
two types
of gametes—one that contained E, and another that contained e—in equal frequencies. The female “tester” fly, on the other hand, had genotype ee, so she made only one type of gamete (which contained e).
How many chromosomes does a fruit fly gamete have?
A sperm or egg cell has only as many chromosomes as a body cell. Scientists often study fruit flies because they have large chromosomes whose genes are easy to see. Every body cell of a fruit fly has 8 chromosomes. Every fruit fly gamete (sperm or egg) has
4 chromosomes
.
What are the two distinct divisions of meiosis?
Meiosis contains
two separate cell
divisions, meaning that one parent cell can produce four gametes (eggs in females, sperm in males). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase. Before entering meiosis I, a cell must first go through interphase.
How many body cells are in a fruit fly?
| Organism Stage in life cycle or organ Estimated cell count | Drosophila melanogaster Embryo cycle 14 6,000 (nuclei) | Drosophila melanogaster Wing disk at metamorphosis 50,000 | Arabidopsis Thaliana Leaf layer 20,000 (leaf 1) to 100,000 (leaf 6) | C. elegans Adult male (somatic) 1031 |
|---|
What is the difference between mitosis and meiosis?
Cells divide and reproduce in two ways, mitosis and meiosis.
Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells
. Below we highlight the keys differences and similarities between the two types of cell division.
What animal has 60 chromosomes?
The goat (Capra hircus)
also has a chromosome number of 60 (Sokolov, 1930; Shiwago, 1931). The chromosomes of the goat were recently studied by Basrur and Coubrough (1964), who found all chromosomes to be acrocentric.
What are the phases of mitosis?
These phases are
prophase, prometaphase, metaphase, anaphase, and telophase
. Cytokinesis is the final physical cell division that follows telophase, and is therefore sometimes considered a sixth phase of mitosis.
How many diploid cells do humans have?
Humans have
46 chromosomes
in each diploid cell. Among those, there are two sex-determining chromosomes, and 22 pairs of autosomal, or non-sex, chromosomes. The total number of chromosomes in diploid cells is described as 2n, which is twice the number of chromosomes in a haploid cell (n).
How many chromosomes are in a 2n 8?
Pictured below, we see how the 2n=8 cell from above has progressed from having 8 chromosomes to
16 chromosomes
: Now that the sister chromatids have separated, each chromatid is also considered a chromosome.
Are skin cells haploid or diploid?
Explanation: Skin cells are
diploid
(blood, skin, muscle cells, etc.) Sex cells (sperm, egg cells) are haploid cells. In meiosis, a diploid cell splits into 4 haploid cells.
