Pavlov noticed that dogs began salivating at the mere sight of the person who regularly brought food to them. For the dogs, the sight of this person had become a conditioned stimulus.
<u>Explanation:</u>
During his studies on dog's digestive reaction Ivan Pavlov initially explored the concept of classical conditioning. He found the dogs were instinctively salivating in reaction to food, but the animals also started drooling if they ever saw the lab assistant's white coat that provided the food. In classical conditioning the conditioned stimulus is a formerly neutral stimulus which gradually tends to cause a conditioned response after being acquainted with the unconditioned stimulus.
For an instance, the scent of food is an unconditional stimulus and its response is a sensation of hunger. Now think that you too heard the sound of a whistle as you tasted your beloved stuff. Although the whistle is irrelevant to the food's scent, if the whistle's noise was combined with the scent several times, the sound alone would inevitably activate the conditioned response.
Complete question:
Imagine that a newly discovered, recessively inherited disease is expressed only in individuals with type O blood, although the disease and blood group are independently inherited.
A normal man with type A blood and a normal woman with type B blood have already had one child with the disease. The woman is now pregnant for a second time.
Assuming that both parents are heterozygous for the gene that causes the disease, what is the probability that the second child will also have the disease? Express your answer as a fraction using the slash symbol and no spaces (for example, 1/2).
Answer:
The probability that the second child will also have the disease is 1/16.
Explanation:
<u>Available data:</u>
- Two genes independently inherited: one for blood type, the other for disease
- Man with type A blood x Woman with type B blood
- Both parents are heterozygous for the gene that causes the disease; Dd
If the man has A blood, and the woman has B blood, and they already have an affected child, this means that they must be heterozygous for blood type too.
Cross:
Parentals) AiDd x BiDd
Gametes) AD Ad iD id BD Bd iD id
Punnett square) AD Ad iD id
BD ABDD ABDd BiDD BiDd
Bd ABDd ABdd BiDd Bidd
iD AiDD AiDd iiDD iiDd
id AiDd Aidd iiDd iidd
F1) <u>Genotype</u>:
1/16 ABDD
2/16 ABDd
1/16 ABdd
1/16 AiDD
1/16 BiDD
2/16 AiDd
2/16 BiDd
1/16 Aidd
1/16 Bidd
1/16 iiDD
2/16 iiDd
1/16 iidd
<u>Phenotype:</u>
3/16 A/B normal
4/16 A normal
4/16 B normal
3/16 0 normal
1/16 0 affected by the disease.
Answer:
116640
1 cubic yard = 46656
therefore 46656 × 2.5 = 116640
Some flowers are bilaterally symmetrical or zygomorphic or mono-symmetric as in these flowers only possible to draw a single line of symmetry through them. Whereas some flowers are radially symmetrical or actinomorphic or poly-symmetric. In them, many lines of symmetry can be drawn. Besides, some flowers are asymmetrical.
Orchid flowers show extreme bilateral symmetry. In Daisy flowers head or capitulum is radially symmetrical capitulum and ray florets are bilateral symmetry. Rose flower is radially symmetrical and <em>Wisteria</em> flowers are bilaterally symmetrical.
Answer:
Given:
UUU- phenylalanine
CUA- Leucine
GCU-Alanine
AAA-Lysine
a) mRNA sequence or codons for the short peptide with amono acid sequence of lys-ala-phe-leu would be:
mRNA (Codons) 5’-AAA-GCU-UUU-CUA-3’
b) tRNA anticodon for the same amino acid sequence lys-ala-phe-leu on the base of mRNA 5’-AAA-GCU-UUU-CUA-3’ would be :
tRNA (Anticodons) 3’-UUU-CGA-AAA-GAU-5’
c) base sequence that would be found in the DNA double helix which carries the gene for this peptide -
5’-AAA-GCT-TTT-CTA-3’ Coding DNA Strand
3’-TTT-CGA-AAA-GAT-5’ Template DNA Strand