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Arte-miy333 [17]
2 years ago
5

Which of the following situations demonstrates a chemical change?

Biology
1 answer:
ra1l [238]2 years ago
6 0

Answer:there is literally nothing to be answered there I can’t even see the objects that can be chemically changed

Explanation:

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Suppose that a dominant allele (P) codes for a polka-dot tail and a recessive allele (p) codes for a solid colored tail. In addi
Maru [420]
If two individual are heterozygous for both traits then there genotype will each look like this PpLl. To find the probability, you need to do a cross with both traits. Each parent has the possibility of giving the following combinations: PL, Pl, pL, pl.
 
                 PL        Pl         pL           pl
PL         PPLL     PPLl     PpLL        PpLl        
Pl          PPLl      PPll      PpLl          Ppll
pL         PpLL     PpLl      ppLL        ppLl
pl          PpLl      Ppll       ppLl          ppll

Polka dot tail/ long lashes: 9/16
Polka dot tail/ short lashes: 3/16
Solid Tail / long lashes: 3/16
solid tail/ short lashes 1/16

The answer is (C) 9:3:3:1 ratio with 9 polka dot tails and long eyelashes, 3 polka dot tails and short eyelashes, 3 solid tails and long eyelashes (there seems to be a typo in the question) and 1 short tail short eyelash
           

3 0
3 years ago
Is the binding of a transcription factor to its dna recognition sequence necessary and sufficient for an initiation of transcrip
hram777 [196]

Transcription factors are necessary for an initiation of transcription at a regulated gene but not sufficient.

Transcription is the first step of gene expression in which DNA molecule is copied (transcribed) into RNA (mRNA) by RNA polymerase. The process of transcription is divided into three phases:

1. Initiation

• RNA polymerase with transcriptional factors bind to gene promoter Transcription factors can enhance the interaction between RNA polymerase and a DNA sequence- promoter, encouraging the expression of the gene. Such transcription factors are called activators. Otherwise, when the gene expression is inhibited, factors are called repressors and they bind to sequence –operator.

• RNA polymerase unwinds DNA double helix (transcription bubble is formed)

2. Elongation

• RNA polymerases adds nucleotides complementary to DNA  

3. Termination

• RNA polymerase gets to stop codon (transcribes a sequence of DNA known as a terminator)

• Formed complementary RNA strand is released from DNA-RNA complex

6 0
3 years ago
Which types of mutations result in abnormal amino acid sequence?
lakkis [162]
Frameshift mutations

6 0
3 years ago
Which of the following apply to food webs? Select all that apply. Food webs are a group of connected food chains. Arrows in a fo
Sunny_sXe [5.5K]

Answer: The correct options that apply to the food web are-

  • Food webs are a group of connected food chains.
  • Arrows in a food web go from the organism that is being eaten to the organism that is eating it.
  • Arrows in a food web represent the flow of energy in a food web.
  • Food webs show all of the eating patterns in an ecosystem.  

A food web is an interconnected network of different food chains representing flow of energy and matter within an ecosystem. The different arrows in a food chain represent organisms being eaten by other organisms, thereby representing flow of energy. It also represents that an animal can consume more than one food type.

 


7 0
3 years ago
Read 2 more answers
What is an estuary? How and why does the salinity of estuaries vary?
olya-2409 [2.1K]

Answer:

Salinity in an estuary varies according to one's location in the estuary, the daily tides, and the volume of fresh water flowing into the estuary. In estuaries, salinity levels are generally highest near the mouth of a river where the ocean water enters, and lowest upstream where freshwater flows in.

Explanation:

6 0
3 years ago
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