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Makovka662 [10]
3 years ago
6

When does crossing over occur in meiosis

Biology
1 answer:
DerKrebs [107]3 years ago
6 0

Answer:

Crossing over occurs during prophase I of meiosis before tetrads are aligned along with the metaphase I.

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PLEASE HELP, I need help on this assignment
Iteru [2.4K]

Answer:

- 9 out of 16 have gray fur and black eyes

- 3 out of 16 have gray fur and red eyes

- 3 out of 16 have white fur and black eyes

- 1 out of 16 have white fur and red eyes

Explanation:

Based on the image attached to this question, the question involves two genes. One coding for fur color and the other for eyes color. The alleles for gray fur (G) and black eyes (B) are dominant over the alleles for white fur (g) and red eyes (b).

Please find attached to this answer an image containing a completion punnet square using the gametes illustrated. According to the punnet square in the image, the following proportions of offsprings were obtained:

- 9 out of 16 have gray fur and black eyes (G_B_)

- 3 out of 16 have gray fur and red eyes (G_bb)

- 3 out of 16 have white fur and black eyes (ggB_)

- 1 out of 16 have white fur and red eyes (ggbb)

7 0
3 years ago
10 points
dalvyx [7]

Solids-holds its shape

Liquid-take the shape of whatever its in

Gases- don't take a shape up

5 0
4 years ago
Fill in the blank Competition drives natural selection as individual members of a species compete with each other for limited na
maks197457 [2]

Answer:

1. Intraspecific

2. speciation

3. fossil record

4. The fossil record provides empirical evidence for evolution because it shows that species now aren't the same as species that existed in the past and that small changes happen over time to create new species.

5. A geographic variation in the fossil record occurs when two similar organisms occupy the same time span in two different places. These organisms hold the same purpose within the overall ecology.

6. A more detailed fossil record is preferable for supporting evolution because it allows for the instances of gradual change to be recorded and placed into broader speciation events.

7. Fossils provide a great many intermediaries that connect past species with their living descendants.

8. Intraspecific competition is competition that occurs within species. This is the competition that drives natural selection.

Explanation:

penn foster

8 0
4 years ago
Which of the following climographs (City A or City B) represents a desert location? How do you know?
kondaur [170]

Answer:

City A

Explanation:

The temperatures are very high, but the amount of precipitation is very low. In city B, the amount of precipitation is high, meaning that it is not a desert.

3 0
3 years ago
In tissue from the intestinal epithelium of a frog, the following proportions of cells were found at each stage of the cell cycl
Alex777 [14]

Answer:

Interphase 0.90 = 18 Hours

Prophase 0.04 = 48 Minutes

Pro-metaphase 0.02 = 24 Minutes

Metaphase 0.01 = 12 Minutes

Anaphase 0.02 = 24 Minutes

Telophase 0.01 = 12 Minutes

6 0
3 years ago
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