Answer:
3/4
Explanation:
If we assume simple dominance and independent assortment for each trait, we can use Mendel's Law of Segregation to predict the phenotypic proportions in the offspring of the parental cross AABBCc x AabbCc.
<h3><u>Gene A</u></h3>
AA x Aa
- F1 genotypes: 1/2 AA, 1/2 Aa
- F1 phenotypes: all A
<h3 /><h3><u>Gene B</u></h3>
BB x bb
- F1 genotypes: 1 Bb
- F1 phenotypes: all B
<h3 /><h3><u>Gene C</u></h3>
Cc x Cc
- F1 genotypes: 1/4 CC, 2/4 Cc, 1/4 cc
- F1 phenotypes: 3/4 C, 1/4 cc
We want to know the proportion of progeny with all dominant phenotype (A_B_C_). Since the genes are independent, we can multiply the probabilities of each gene to obtain the overall probability of having a ABC progeny:
<h3>1 A_ x 1 B_ x 3/4 C_ = 3/4 A_B_C_</h3>
Answer:
How Convection Works. Convection currents form because a heated fluid expands, becoming less dense. The less-dense heated fluid rises away from the heat source. As it rises, it pulls cooler fluid down to replace it. This fluid in turn is heated, rises and pulls down more cool fluid.
Explanation: Hope this helps.
Gene expression begins with transcription and occurs in the <u>nucleus.</u> To create an <u>RNA molecule,</u> the DNA sequence of a gene must be copied. <u>RNA polymerases, </u>which join nucleotides to create an RNA strand, carry out transcription (using a DNA strand as a template).<u> Initiation, elongation, and termination</u> are the three phases of transcription.
- RNA polymerase is the enzyme responsible for constructing the messenger RNA transcript from the template DNA.
- The synthesis of mRNA always proceeds in a 5’ to 3’ direction. In eukaryotes, the nucleus is the site of mRNA synthesis, whereas, in prokaryotes, mRNA is formed in the cytoplasm. The process of transcription has three stages:
Initiation stage – RNA polymerase begins the synthesis by recognizing the gene present at the beginning of the template strand.
The polymerase binds to the specific sequence, which at present at the initial end of the template. These are called consensus sequences. Specific transcription factors facilitate the recognition and binding of the consensus sequence with RNA polymerase.
Elongation stage – the RNA polymerase copies the mRNA complementary to the coding strand. The process of elongation continues till the RNA polymerase reaches the terminal sequence. Certain factors facilitate the elongation process called extension factors.
Termination stage – RNA polymerase, upon reaching the termination sequence, stops the transcription. At this point, no more elongation is carried out. The nascent mRNA is released from the transcription bubble by either of the two processes:
- By formation of a hair loop structure that pulls the mRNA from the transcription complex or,
- A protein called Rho utilizes ATP to break the bonds and release the nascent mRNA.
learn more about transcription here: brainly.com/question/25703686
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Answer:
A. One cell took over another cell
Explanation:
Mitochondria is an organelle present in a eukaryotic cell that performs the function of producing ATP molecules from the available substrates in the cell.
The mitochondria organelle has its DNA other than the cellular DNA which shows that it was once an independent organism. This was proved by the endosymbiotic theory that during the formation of the eukaryote cell, the proto-eukaryote engulfed the chemosynthetic bacteria which later formed the symbiotic relationship with the cell and evolved into the mitochondria.
Thus, Option-A is the correct answer.
Answer:
A punnet square can be described as a diagram which shows the probabilities of the expected genotypes of offsprings from a cross.
The punnet square for the above mentioned question are shown below.
A cross between a homozygous dominant and homozygous recessive pod plant shows that the children will be heterozygous for the green pod trait.
A cross between a heterozygous green pod plant and a homozygous recessive pod plant shows that 50% of the plants will be heterozygous green pods and 50% will be recessive pods.