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Vikki [24]
3 years ago
12

Among a species of butterflies, the color blue (B) is a dominant trait. Yellow color (b) is a recessive trait. If a pure blue bu

tterfly (BB) mates with a pure yellow (bb), what will the offspring look like?
A) They will all be blue.
B) They will all be yellow.
C) Half will be blue and half will be yellow.
D) About 75% will be blue and 25% will be yellow.
Biology
2 answers:
patriot [66]3 years ago
6 0

Answer: The correct answer is- A) They will all be blue.

As per the information given in the question, blue color (B) is dominant trait in butterflies over the yellow color (b), which is a recessive trait.

As we know that dominant trait always masks the expression of recessive trait.

The possible genotypes for blue color butterfly are- Bb (heterozygous dominant) and BB (homozygous dominant) whereas for yellow color butterfly is bb (homozygous recessive).

Genotypes of the parents are - BB (which will produce gametes, B and B) and bb (which will produce gametes, b and b).

When these parents are crossed, their offspring will have the genotype Bb (heterozygous dominant).

Thus, they will all be blue.

Sav [38]3 years ago
6 0

A) They will all be blue.

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Answer

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Explanation

The trait of height and skin tone are controlled by different genes and are also affected by environmental factors. The skin tone and height within the population is not specific, both have wide ranges varies from high expression of the gene to less or even no expression of the gene. Mostly these factors are mostly affected by inheritance and less by environmental factors.

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Ok is that 23 in females or 23 in males?
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Drag each tile to the correct location. Depending on the type of reproduction, offspring can be genetically identical, a clone o
just olya [345]

Answer:

1. fragmentation- genetically identical

2. budding- genetically identical

3. haploid cells from two different mycelia fuse to form a zygote- genetically distinct

4. one hyphae creates spores through mitosis- genetically identical

Explanation:

1) Fragmentation is a form of asexual reproduction i.e. one parent, employed by certain organisms including fungi in which a FRAGMENT breaks off from the single parent to produce new cells. Since it is an asexual reproduction, the resulting cells will be GENETICALLY IDENTICAL.

2) Budding is another form of asexual reproduction that fungi undergoes e.g yeast. In the budding process, buds develop on the parent cell and later grow into mature cells that are GENETICALLY IDENTICAL to the parent cell.

3) In fungi, two different mycelia can produce haploid sex cells via the process of meiosis, which then fuse to produce a ZYGOTE. This method is a sexual means of reproduction. Hence, the zygote formed will be GENETICALLY DISTINCT from the parent.

4) Hyphae (threadlike filaments) of a fungi can via MITOTIC DIVISION produce spores, which then germinates under favorable conditions and grows into a new fungus. This new fungus cell is GENETICALLY IDENTICAL to the parent hyphae.

6 0
3 years ago
The collective term for factors that act to limit the growth of populations is ____.
Dominik [7]

Answer:

Environmental Resistance

Explanation:

Environmental resistance can be defined as all the factors including physical factors, chemical factors and  environmental factors  including biotic and abiotic factors (e.g drought, mineral deficiencies, and competition) limiting the life forms of an organism or kind of organism and impose a restriction on their numerical increase. These factors limit the growth of  species in a population.

8 0
3 years ago
In the cranial nerve model, which best describes the location of the optic chasma:________
eimsori [14]

Answer:

  • <u>Cranial Nerves:</u>

The cranial nerves are the set of 12 pairs of nerves which are originated from the brain. As they are responsible for some of the essential functions , such as vision, smell, and balance of the human body structure.

<u>The 12 pairs of the cranial nerves are as as under:</u>

  1. The olfactory nerve
  2. The optic nerve
  3. The oculomotor nerve
  4. The trochlear nerve
  5. The trigeminal nerve
  6. The abducens nerve
  7. The facial nerve
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  10. The vagus nerve
  11. The spinal accessory
  12. The hypoglossal nerve,
  • It is very hard for the students to remember all the names of the cranial nerves as we can just recall them by memorizing the device-<em>Old Opie Occasionally Tries Trigonometry And Feels Very Gloomy, Vague And Hypoactive.</em>

Explanation:

  • <u>Optic chasma:</u>

The optic chasma originates as one of the cranial nerves, as it serves for the function of vision sense in human body. The nerves are responsible for carrying the set of information and data from the retina of the eye to the brain. As the communication between the two regions or part of the body, as they hold the capacity to carry the charges or information from the retina of the eye towards the brain.

4 0
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