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Tanya [424]
3 years ago
7

Some roses have streaks of pink and streaks of red to give a striped effect to

Biology
1 answer:
zmey [24]3 years ago
7 0

Answer:

The correct answer is - incomplete dominance is the correct answer.

Explanation:

Incomplete dominance is the inheritance where there is no complete dominance takes place and where is the mix of both alleles trait mixes or blends in the offspring.

The red or purple cross with white plants flower cross the incomplete inheritance takes place to produce a striped effect to their petals.

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What does the horizontal line between<br> the male and female represent?
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it represents the mating between males and females is shown by a horizontal line between their respective symbols.

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What is humidity? If the humidity is 95% does that mean 95% of the air is water vapor?
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3 years ago
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True or false: a habitat can only include one niche. ?
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Which of the following is the most cost effective source of energy?
elena55 [62]

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3 years ago
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Briefly describe how amniocentesis and chorionic villi sampling are used in genetic screening.
bearhunter [10]

Answer:

Amniocentesis is an invasive method that involves the aspiration of 10-20 ml of fetal water through the abdominal wall under ultrasound-guided control. In most cases, the procedure is performed around the 16th week of gestation. The fetal water sample contains fetal cells, mostly cells of fetal skin and the epithelium of the urinary tract.

Chorionic Villus Sampling (CVS) biopsy is performed between weeks 11 and 12 of gestation. During biopsy, with ultrasound guidance, the tissue of the chorionic fossa is aspirated mainly across the abdomen (transabdominal pathway). The biopsy specimen is of fetal origin and belongs to the outer layer of blastocyst cells or the trophoblast (outer layer of the placenta). Very often, the biopsy specimen contains tissue of the decidua (mucous membrane of the uterus) that is of maternal origin, and it is necessary to remove the maternal tissue before any treatment of the sample.

Explanation:

The amniocentesis procedure carries a risk of miscarriage of 0.5-1%.  After aspiration of the fruit of the water, the sample is centrifuged to separate the cells from the amniotic fluid. Separate cells are seeded on a nutrient medium (cell culture) that stimulates cell growth. After about 14 days, the cell culture is further used for various genetic or biochemical analyzes such as karyotyping.

The advantage of chorionic biopsy is the amount of biological material, which is sufficient for the whole a number of different laboratory procedures. Also, a great advantage is the timing of the procedure as it allows diagnosis in the first trimester of pregnancy, but the chorionic biopsy procedure itself carries a risk of miscarriage of 1-2%.

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3 years ago
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