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3 years ago

Viruses need host cells to replicate true or false

1 answer:

3 0

Viruses depend on the host cells that they infect to reproduce. When found outside of host cells, viruses exist as a protein coat etc.

true.

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Line graphs that indicate time along the x-axis can be used to predict what would happen to dependent variables in an

Dmitry [639]

Answer:

if the experiment continued under the same conditions

Explanation:

you can only go on to prove something if its under the same conditions

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3 years ago

If an individual has an extra chromosome in every one of its cells, what mutation must have occurred?

Lena [83]

. A non-disjunction mutation in the gamete of one of the parents

7 0

3 years ago

Oswald Avery and colleagues strengthened scientific support that DNA was the transforming factor by replicating the Griffith exp

AlexFokin [52]

Answer:

C) DNase (DNA destruction)

Explanation:

Oswald Avery and colleagues strengthened scientific support that DNA was the transforming factor by replicating the Griffith experiment with some important differences in experimental design.

4 0

3 years ago

A good way to avoid bias when collecting samples is to ___.

MariettaO [177]

Answer:

D. Collect a large sample number

Explanation:

With a larger sample number, that means that more people participated and gave the correct answer. If you constantly change the variable, the answer may always be the same but because of the variable you changed.

8 0

2 years ago

The kernel color in wheat is a continuous trait determined by two additive genes, each with two alleles, that equally contribute

dedylja [7]

Answer:

Phenotypic ratio: 1:4:6:4:1

Punnett square: Below in the explanation box

Frequency distribution: In the attached files

Explanation:

<u>Available data</u>:

The kernel color in wheat is a continuous trait determined by two additive diallelic genes
The red kernels are determined by two genes and two dominant alleles (R1R1R2R2)
The white kernels are determined by two recessive alleles at the same two genes (r1r1r2r2)
R1 and R2 alleles are dominant over r1 and r2, respectively

1st Cross: a true-breeding red plant with a true-breeding white plant

Parentals) R1R1R2R2 x r1r1r2r2

Gametes) R1R2, R1R2, R1R2, R1R2

r1r2, r1r2, r1r2, r1r2

F1) 100% R1r1R2r2

2nd Cross: F1 progeny are selfed

Parentals) R1r1R2r2 x R1r1R2r2

Gametes) R1R2, R1r2, r1R2, r1r2

R1R2, R1r2, r1R2, r1r2

Punnett square) R1R2 R1r2 r1R2 r1r2

R1R2 R1R1R2R2 R1R1R2r2 R1r1R2R2 R1r1R2r2

R1r2 R1R1R2r2 R1R1r2r2 R1r1R2R2 R1r1R2r2

r1R2 R1r1R2R2 R1r1R2r2 r1r1R2R2 r1r1R2r2

r1r2 R1r1R2r2 R1r1r2r2 r1r1R2r2 r1r1r2r2

F2) Genotype:

1/16 R1R1R2R2 (dark red)
2/16 R1R1R2r2 (red)
1/16 R1R1r2r2 (light red)
2/16 R1r1R2R2 (red)
4/16 R1r1R2r2 (light red)
2/16 R1r1r2r2 (very light red)
1/16 r1r1R2R2 (light red)
2/16r1r1R2r2 (very light red)
1/16 r1r1r2r2 (white)

Phenotype:

1/16 R1 R1 R2R2, dark red phenotype
4/16 R1r1R2R2 + R1R1Rr2, red phenotype
6/16 R1r1 R2r2 + r1r1R2R2 + R1R1r2r2, light red phenotype
4/16 R1r1 r2r2 + r1r1R2r2, very light red phenotype
1/16 r1r1r2r2, White phenotype phenotype

Phenotypic ratio: 1:4:6:4:1

Frequency table:

<u>DOSAGE FREQUENCY</u>

Dark red 1/16

Red 4/16

Light red 6/16

Very light red 4/16

White 1/16

3 0

3 years ago