A. external
These types of signals are observed when there is a cut on the body. The epidermal cells lose contact with one another and divide faster until they are in contact once again. After they come into contact, division slows down again.
Gametes are haploid cells
Cells of each parent contain 46 chromosomes
but gametes ( cells which combine to form zygote e.g ovum and sperms) consist of 23 chromosomes ( half of 46 ) and so are known as haploid..cells....
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Weathering is a natural process by which the surface mineral of rocks is carried away by various agents .The agents can be water,wind,and ice. weathering means disintegration of rocks and the small parts are being carried away by these agents and are found on different places.Weathering of rocks depends on the many factors such as climatic conditions,type of rock,water availability and many more.The small rocks mix with soil and helps form sediment .This sedimentation helps to shape the earth's surface.This is an important part of rock cycle and is very important.
Answer:
The answer is 7.5 feet.
Explanation:
When a wave has a height of 5 feet and a wavelength of 15 feet then it has a wave base of 7.5 feet. Wave base is equal to the half of the wavelength so if you consider your wavelength to be 15 feet then it is divided into 2 that would give you answer of 7.5 feet.
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Answer:
- If the plant is homozygous, the percentage of purple-flowered progeny is expected to be 100%.
- If the plant is heterozygous, the percentage of purple-flowered progeny is expected to be 50%.
Explanation:
A test-cross is performed between an individual for whom you want to know the genotype (to find out if it is heterozygote or homozygote) and a recessive homozygote individual.
If the first individual is a heterozygote, the progeny phenotypic and genotypic proportions are 50% heterozygote and 50% recessive homozygote. But if the first individual is a homozygote, the whole progeny will be expressing one of the traits.
This is, from the proposed example, we know that:
- The allele for purple flower color is dominant to the allele for white flower color.
- A test-cross was performed to determine the genotype of a purple-flowered plant
We will represent the allele expressing purple color as P, and the allele expressing white color as p.
The purple-flowered plant genotype might be PP or Pp, so the options are:
Gametes) P P p p
Punnet square) P P
p Pp Pp
p Pp Pp
F1 Genotype) 100% Purple-flowered plants. The genotype of the tested individual was homozygote for the purple trait.
Gametes) P p p p
Punnet square) P p
p Pp pp
p Pp pp
F1 Genotype) 50% Purple-flowered plants and 50% white-flowered plants. The genotype of the tested individual was heterozygote for the purple trait.