The correct choice is D.
A karyotype is the layout of chromosomes, in size order from largest to smallest. These chromosomes are ALWAYS in pairs, meaning that it would be easy to notice which of the 23 chromosome pairs have 3 chromosomes instead of the usual pair.
<span>A. Classical Conditioning
Little Albert was initially exposed to a variety of stimuli and displayed no fear towards them.
In the next step of the experiment, when Little Albert was again exposed to a rat, the experimenters hit a pipe to make a loud noise, causing Little Albert to cry. This pairing of the stimuli of loud noise and rat was continued repeatedly. After enough repetitions, Little Albert began to cry just by seeing the rat.
The experiment involved the unconditioned and conditioned stimuli and responses of classical conditioning.
Unconditioned stimulus: loud noise
Unconditioned response: fear
Conditioned stimulus: rat
Conditioned response: fear</span>
An organism in which the two copies of the gene are identical that is, have the same allele is called homozygous for that gene
Answer:
What are the systems
Explanation:
I can help after u answer that sorry
