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Dafna1 [17]
3 years ago
5

What happens to the atomic radius as you move down a group on the periodic table

Biology
1 answer:
ipn [44]3 years ago
3 0
As you move down a group, atomic radius increases
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Consider two different traits in mice affecting tail length and fur color. A two-factor cross was made involving true-breeding m
Stells [14]

Answer:

See the answer below

Explanation:

Null hypothesis: The two genes are independently assorting and therefore, are not linked to each other.

Let A represents the allele for tail length and B for fur color. Long-tail A is dominant over short tail a while brown fur B is dominant over white fur b.

For the first cross involving true-breeding mice:

    AABB   x   aabb

F1         AaBb (long tails and brown fur)

For the second cross:

      AaBb   x   aabb

4 AaBb - Long-tail, brown fur

4 Aabb - Long tail, white fur

4 aaBb - short tail, brown fur

4 aabb - short tail, white fur

Since the phenotypic ratio from the cross is 1:1:1:1, if the null hypothesis was to be true, it means that the expected phenotype ratio should be 1:1:1:1.

In order to test this hypothesis, we use Chi-square:

phenotype                           O            E                 X^2  

Long-tail, brown fur           118          97.5        \frac{(118-97.5)^2}{97.5} = 4.31

Long tail, white fur              77           97.5             4.31

short tail, brown fur             81           97.5              2.79

short tail, white fur              114           97.5              2.79

Total                                                                          14.2

Degree of freedom = 4 - 1 = 3

Critical Chi-square value = 7.815

The calculated Chi-square value is more than the critical value, hence, the null hypothesis is rejected.

8 0
3 years ago
g "A protein is made from a messenger RNA of the following sequence. What is the sequence of amino acids for this protein? (Reme
KiRa [710]

Answer:

The correct answer is (amino) met - lys – phe

Explanation:

3' G C C G A U G G A U G A A G U U U U A A A G U A A U A G C A A U G G A G G A C 5'

Write the mRNA in opposite or reverse order as 5' to 3' and then start with AUG  codon.

Write the mRNA in revers order as 5’ to 3’ and starts with AUG codon.

5’-CAGGAGGUAACGAUAAUGAAAUUUUGAAGUAGGUAGCCG -3’

mRNA—5’AUG-AAA-UUU-UGA-AGUAGGUAGCCG -3’      

Peptide: (amino) Met-Lys-Phe-STOP

4 0
3 years ago
Which statement is true of a chemical reaction Energy is always released energy is always absorbed energy is not transferred ene
Ugo [173]

Answer:

Energy is not transferred

4 0
3 years ago
The following diagram shows sea cliffs and small, sandy beaches formed along a coastline.
JulsSmile [24]

Answer:

Weathering and erosion formed the cliffs, and deposition formed the beaches.

Explanation:

8 0
3 years ago
Explain how x-rays cause damage to human cells.
sergiy2304 [10]

When the human body (its cells) is exposed to radiation (X rays and gamma rays), electrons are emitted from atoms and molecules. ... ・These radicals react immediately with surrounding atoms, causing abnormal chemical reactions (or, minor damage to localized areas of cells).

7 0
3 years ago
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