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tatuchka [14]
3 years ago
12

You have batch of pea plants with purple flowers that you grew by crossing plants that had purple flowers (PP) with plants that

had white flowers (pp).
Which will be expressed in this batch of pea plants?
A. white flowers (dominant).
B. white flowers (recessive).
C. purple flowers (recessive).
D. purple flowers (dominant).
Biology
2 answers:
Neko [114]3 years ago
8 0
P P
p Pp Pp
p Pp Pp

The final product will all have purple flowers since its dominant. The answer would be D
grandymaker [24]3 years ago
4 0
Its C. purple flowers (recessive).
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Marat540 [252]

The decay of uranium isotopes is used to provide information about the age of Earth.

<h3>Explanation:</h3>

Isotopes of Uranium U-232, U-233 , U-234 , U-235 , U-236 , U-238 are used as fuel in nuclear reactors or as explosives for nuclear weapons. Uranium 238 is not very radioactive and it constitutes for nearly 99.3% of natural uranium on Earth and has the longest lifetime: its period is 4.5 billion years, about the age of Earth.

Use of radiometric dating techniques help in defining the age of substances (natural or man-made) using the known decay rates of radioactive elements. Each element has an  individual decay rate and half life time.

Two Uranium isotopes (U-238 and U-235) are used for radiometric dating. Both the isotopes have different decay rates and half life period. Both are unstable and radioactive. Since two different isotopes produce two different decay clocks (one as a reference to other), it is beneficial in accurately determining the age of samples. The age of earth (rocks or other natural elements) can be easily determined using Uranium isotopes.

4 0
3 years ago
Every mollusk has a head, body, and _____. jointed legs a muscular foot hinged shells an external shell
STatiana [176]

Answer:  [B]:   " a muscular foot ".

______________________________________________

     "Every mollusk has a head, body, and <u>  muscular foot  </u> . "

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Hope this helps!

Best wishes!

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4 0
3 years ago
?????? help ????????!!!!!!
alexira [117]

Answer:

2 and 4

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6 0
3 years ago
Read 2 more answers
In some breeds of mice, yellow coat color is
Elis [28]

In the exposed lethal genes cause the individual's death during embryionic development before being born. H0m0zyg0us dominant individuals do <u>not get born</u>. Yellow: 2/3. Grey: 1/3. Phenotypic ratio: 2:1

<h3>What is complete dominance?</h3>

When the dominant allele completely masks the expression recessive allele, we talk about complete dominance.

This is the case of individuals that are heter0zyg0us for a particular gene and express the dominant trait.

The dominant allele is hiding the expression of the recessive allele.

<h3>What are the lethal genes?</h3>

Refer to genes that impede the normal development of the individual.

  • They can cause death during embryo development <u>before the individual gets born, </u>
  • They can cause the individual's death after being born and <u>before reaching </u><u>sèxual maturity</u><u>.  </u>

Let us assume that mice color is coded by a single diallelic gene that expresses complete dominance.

<u>Available data</u>:

  • Yellow color is dominant over grey color.
  • Yellow is coded by the dominant allele Y
  • Grey is coded by the recessive allele y

  • Genotype YY → Yellow and lethal
  • Genotype Yy → Yellow
  • Genotype yy → Grey

The cross would be as follows,

Cross:  Yy   x    Yy

Gametes) Y    y     Y    y

Punnett square)    Y      y

                      Y     YY    Yy

                      y      Yy     yy

F1) Considering ONLY the successfully born individuals

<u></u>

<u>Genotype</u>

2/3 = 50% of the progeny is expected to be heter0zyg0us, Yy.

1/3 = 25% of the progeny is expected to be h0m0zyg0us recessive, yy.

<u></u>

<u>Phenotype </u>

2/3 = 50% of the progeny is expected to be yellow, Yy.

1/3 = 25% of the progeny is expected to be grey, yy.

The phenotypic ratio is 2:1

You will learn more about lethal genes at

brainly.com/question/13654244

brainly.com/question/14932405

5 0
2 years ago
Which property of water allows insects to walk on top of it? And explain
melisa1 [442]

Answer:

surface tension

Explanation:

i think it might be C just google the definitions of the answers and you'll know

3 0
2 years ago
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