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Fynjy0 [20]
3 years ago
14

White spotting, or piebald trait, characterized by an absence of hair pigment in specific places, is caused by mutant copies of

a A) carbohydrate. B) gene. C) lipid. D) steroid
Biology
2 answers:
r-ruslan [8.4K]3 years ago
6 0
B. Gene. Piebalding is caused by mutant copies of genes.
Maksim231197 [3]3 years ago
5 0

Answer: Gene

Explanation:

Mutation can be defined as the change in the single base pair of the DNA. Each and every trait inside an eukaryotic organism body is controlled by the help of the gene.

Pie bald is also a trait controlled by the genes in the body. Pie bald can be defined as a pattern of unpigmented spots on the pigmented background of scale, feather and hair.

Example: A pie bald black and white dog is a black dog with white spots on it.

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HELP ME ASAP!!!!!!!!!!!!!!!!
fredd [130]

28. <u>Answer</u>: All mutations do not affect the organisms due to the following reasons:-

1. The DNA consists of both coding and non coding regions. The coding regions are known as exons and non coding regions are called as introns. The <em>non coding regions </em>do not make up the protein. Thus, if the mutations occur in non coding regions they do not affect the organism.

2. There are some mutations that result in the change of the codon but the new codon formed codes for the same amino as the previous one. This is possible because of the degeneracy of genetic code. For eg, AAA codes for lysine, however if the mutation changes this code to AAU then this also codes for lysine. Such mutations are called as <em>silent</em> mutations.

3. There are some mutations which result in the change in amino acid however the new amino acid formed is similar to the previous one in its properties for e.g leucine and isoleucine. Such mutations are called as <em>neutral</em> mutations and they do not affect the organism


29. <u>Answer</u>: 1. The process of mitosis results in the formation of <em>two diploid cells</em> whereas meiosis results in the formation of <em>4 haploid cells.</em>

2. The process of mitosis takes place to produce copies of the <em>body cells </em>whereas the process of meiosis takes place to produce the <em>gametes</em>.

<u>Explanation</u>:-

  • <u>Mitosis</u> is a process in which a cell undergoes a single round of division to produce two identical copies of itself . It occurs in 4 phases Prophase, metaphase, anaphase and telophase. This process occurs in the body cells.
  • <u>Meiosis</u> is a process in which a cell undergoes two rounds of cell division to produce 4 copies of haploid cells from a single diploid cell. This process takes place for the formation of gametes.

29. <u>Answer</u>:

<em>Pros</em>

1. Genetic engineering helps us to tackle several diseases. There are many diseases which are caused due to genetic mutations. Genetic engineering helps us to rectify these mutations and hence combat such diseases.

2. Genetic engineering helps us to produce new foods which can withstand adverse conditions such as high/low temperatures, low rainfall, are disease and pest resistant etc. This, genetic engineering helps to significantly improve crop production.

<em>Cons</em>

1. Genetic engineering leads to a decrease in genetic diversity.

2. It can lead to a decrease in the nutritional value of food as genetic engineering often causes an accelerated growth of animals and hence, the nutritional valie of poultry foods is compromised.


3 0
3 years ago
The movement of water in or out of the cell membrane without the use of ATP.
dimulka [17.4K]
The answer is Osmosis because its the only one that has anything to do with water
3 0
3 years ago
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You return from lunch to science class, and there are two clear liquids on your
MrMuchimi

Answer:

My best guess would be boil it!

4 0
3 years ago
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Select the four natural events that could cause local competition for natural resources.
Ket [755]

Answer:

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7 0
2 years ago
Which of the following best describe how genes allow cells to carry out essential life functions?
Tems11 [23]

Answer:

The correct answer is D. The genes are coded to produce specific proteins, by the process of transcription and translation.

These proteins then, lead to the production of characteristic traits like eye color, hair color etc.

So genes indirectly control the traits

Explanation:

5 0
2 years ago
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