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MA_775_DIABLO [31]
2 years ago
15

We have learned Kepler's Laws, Newtons laws of Motion and Gravity, as well as where planets are in relationship to the sun. Know

ing these things can you provide two generalized statements about the planets and yourself or about the planets and the laws.
Biology
1 answer:
GalinKa [24]2 years ago
7 0

Answer:

''Planets moves around the sun with constantly changing speed.''

''The sun uses its gravity to pull the planets towards it''

Explanation:

These two statements describes Newtons laws of Motion and Gravity. With statement 1, which shows the motion of the planets constantly changing due to the attraction of the sun. When the planets come close together to the sun, its orbital speed increases while on the other hand, when the planets goes farther from the sun, its orbital speed decreases. The statement 2 indicates that sun attracts other planets due to its gravity which allow them to move in a curved.

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If A/A ⋅ B/B is crossed with a/a ⋅ b/b and the F1 is testcrossed, what percentage of the testcross progeny will be a/a ⋅ b/b if
Alex787 [66]

Answer:

a) 25%; b) 50%; c) 45%; d) 38%

Explanation:

<h3 /><h3>a) Unlinked genes</h3>

A/A B/B X a/a b/b

F1: A/a B/b

Testcross A/a B/b X a/a b/b

The homozygous recessive individual only produces <em>ab</em><em> </em>gametes.

The F1 produces four types of gametes (each of them with a frequency of 1/4):  <em>AB</em>, <em>Ab</em>, <em>aB </em>and <em>ab</em>.

25% of the progeny will be a/a b/b.

<h3>b) Completely linked genes</h3>

AB/AB X ab/ab

F1: AB/ab

Testcross AB/ab X ab/ab

The F1 produces only two types of gametes, the parentals (each of them with a frequency of 1/2):  <em>AB</em> and <em>ab</em>.

50% of the progeny will be ab/ab.

<h3>c) 10 m.u. apart</h3>

AB/AB X ab/ab

F1: AB/ab

Testcross AB/ab X ab/ab

The F1 produces four types of gametes, the parentals <em>AB</em> and <em>ab </em>and the recombinants <em>Ab</em> and <em>aB</em>.

Since the genes are 10mu apart, 10% of the produced gametes will be recombinant and 90% will be parentals. Since there are two types of parental gametes, each of them has a frequency of 45%.

45% of the progeny will be ab/ab.

<h3>d) 24 m.u. apart</h3>

This is very similar to c).

Since the genes are 24mu apart, 24% of the produced gametes will be recombinant and 76% will be parentals. Since there are two types of parental gametes, each of them has a frequency of 38%.

38% of the progeny will be ab/ab.

5 0
3 years ago
What is a "false crawl"
xeze [42]
A false crawl<span> is when a turtle comes onto the beach with the intention of laying eggs but returns to the water without nesting. Hope this helps! 

This was not copied from a website or someone else. This was from my last year report.




</span><span>
</span>
5 0
3 years ago
Which species is most closely related to Humans (Homo sapiens)? explain
FrozenT [24]

Answer:

Primates

Explanation:

Humans are primates a diverse group that includes some 200 species. Because primates are related, they are genetically similar. Human DNA is, on average, 96% identical to the DNA of our most distant primate relatives, and nearly 99% identical to our closest relatives, chimpanzees and bonobos.

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3 years ago
The cells in this part of a plant form long, vertical tubes. What is the most
OverLord2011 [107]

Answer:

xylem and pholem.....?

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3 years ago
Do all mammals have hair?
Rus_ich [418]
Yes. Some mammals may have less hair/fur, but all mammals do. It is a defining characteristic of a mammal.
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