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4 years ago

Dimples (D) and brown hair (A) are dominant traits. Answer the following questions based on the dihybrid cross shown:

1 answer:

5 0

1. DDAA, DdAa
2. DDaa, Dada
3. ddAA, ddAa
4. ddaa
5. The phenotypic ratio is 9:3:3:1 where 9 combinations will produce offspring with both dominant phenotypes (dimples and brown hair), 3 will produce offspring with one dominant phenotype and one receive phenotype (dimples, blonde hair), 3 will produce offspring with one receive phenotype and one dominant phenotype (no dimples, brown hair), and one will produce offspring with both recessive phenotypes (no dimples, blonde hair)

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A palavra átomo tem origem grega,com o significado de indivisível.Por que esse termo foi escolhido para descrever as partículas

earnstyle [38]

Translated from Portuguese language:

"The word atom has a Greek origin, meaning indivisible. Why was this term chosen to describe the particles that form matter? Is the atom really indivisible?".

Answer:

An atom is termed as the basic unit for generating or creation of the different complex structures, as they are characterized by the different shapes and properties due to position or alignment of the different number of atoms inside the given parameters or are of the object.
It was a belief in the early times that atom is not divisible further in to small sub atomic parts, this concept was improved by the experiments of the cathode ray tube etc.

Explanation:

However, the atom is comprised of the following subatomic particles which are as follows:

The nucleus is comprised of the protons(positrons) and neutrons.
While, the outer region or the cloud is comprised of the electrons inside the different shells and orbits.

4 0

3 years ago

Tetrahydrocannabinol, the active ingredient in marijuana, binds to receptors located in the ________ terminals of certain brain

padilas [110]

Answer:

This question lacks options, the options are:

a. Presynaptic; Ca2+ ions

b. Postsynaptic; Ca2+ ions.

c. postsynaptic; neurotransmitters

d. presynaptic; neurotransmitters

e. dendritic; neurotransmitters

The correct answer is d. Tetrahydrocannabinol, the active ingredient in marijuana, binds to receptors located in the presynaptic terminals of certain brain neurons. It lowers the likelihood that these neurons will release neurotransmitters .

Explanation:

Tetrahydrocannabinol is the most abundant cannabinoid in most cannabis varieties and has the most potent psychoactive effect. Conventional neurotransmitters are water-soluble substances stored in small vesicles at the thin ends of the axon (presynaptic terminals). When a neuron generates an impulse by sending an electrical signal along the axon to the presynaptic terminals, the neurotransmitters are released from the vesicles, diffuse through a narrow intercellular space (synaptic cleft) and interact with the receptors on the surface of the recipient neuron (postsynaptic neuron). Cannabinoids cause a decrease in the release of neurotransmitters from the presynaptic terminal through the inhibition of Ca++ channels. This signaling is mediated by the βγ subunit of the G protein. The βγ subunit of the G protein inhibits the Ca channels of type N and P / Q, which are the majority in presynaptic neurons.

8 0

3 years ago

The cross-fertilization of two different, but true-breeding, varieties of pea plants will _____.

Tresset [83]

Answer: Result in Hybrid Plants

Explanation:

The cross-fertilization of two different, but true-breeding, varieties of pea plants will result in hybrid plants.

3 0

3 years ago

Please help!! Will mark brainiest!

ZanzabumX [31]

Answer:

Bioaccumulation

Explanation:

Bioaccumulation is the of accumulation of harmful chemicals.

3 0

2 years ago

Which of these cars do you think is not accelerating?

Inga [223]

I think the answer to your question is q
A

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3 years ago