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Kaylis [27]
3 years ago
5

A scientist is studying the inheritance of two characteristics in plants: red flowers (RR and Rr) , which are dominant to yellow

flowers (rr) , and green leaves (GG and Gg) , which are dominant to yellow leaves (gg) . She crosses a double heterozygous (RrGg) with a double recessive (rrgg) , and expect to see a 1:1:1:1 ratio in the offspring. Instead, she sees these results: Genotype RrGg rrgg Rrgg rrGg Predicted outcome 500 500 500 500 Actual outcome 900 900 100 100 Which phenomenon would she hypothesize accounts for the pattern she sees? crossing-over respiration cytokinesis independent assortment
Biology
1 answer:
marin [14]3 years ago
7 0

Answer:

The correct option is <em>B. Crossing- over </em>

Explanation:

In biology, crossing over can be described as a phenomenon by which homologous chromosomes exchange segments during the process of meiosis.

The unexpected results came because the DNA segment between the homologous chromosomes was exchanged during meiosis. The alleles got shuffled by this process and hence showed the unexpected results.

Crossing over and independent assortment are phenomenon which occurs only during the process of meiosis. These phenomenons cannot be observed during mitosis.

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30 POINTS!
andrew11 [14]

Answer:

A represents photosynthesis and B represents cellular respiration.

Explanation:

As in A there is utilization of carbon dioxide and water to make oxygen and glucose which is a key process of photosynthesis, and then this oxygen and glucose is used as energy source to produce carbon dioxide and water as by products of respiration.

6 0
2 years ago
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Based on what you know about the regulation of cell growth, make a list of questions you would ask as you observe the cells.
sertanlavr [38]

Answer:

1. What genes control the growth of cell growth?

2. What is the purpose of this regulation?

3. What happened when the cell growth is not regulated?

Explanation:

What genes control the growth of cell growth? What is the purpose of this regulation? What happened when the cell growth is not regulated?

Above are the questions which an observe would ask about regulation of cell growth. A number of genes such as oncogenes and tumor suppressor genes are involved in the regulation of cell growth and cell division. Regulation of cell growth process ensures that a cell's DNA which is dividing is copied properly as well as repair errors in the DNA. It also ensures that each daughter cell receives a complete set of chromosomes in order to gain healthy daughter cells.

4 0
2 years ago
Trace the path of an egg cell by filling in the blanks.
Nadya [2.5K]
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3 0
2 years ago
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pshichka [43]

Answer:

Restriction enzymes (endonucleases) are used to cut the DNA into fragements.

Explanation

Restriction enzymes are obatained from bacteria where they are utilized by bacteria for protection against viruses. Restriction enzymes are used in biotechnology research. There are several restriction enzymes and each cut the DNA at specific site known as recognition site which is usually 4-8 neucleotide long. They produce sticky ends (cutting the both DNA strand on different site) and blunt ends (cutting the both DNA strand on same site) on DNA fragments.

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n200080 [17]
D- weight is a measure of the force of gravity on objects
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2 years ago
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