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Kaylis [27]
3 years ago
5

A scientist is studying the inheritance of two characteristics in plants: red flowers (RR and Rr) , which are dominant to yellow

flowers (rr) , and green leaves (GG and Gg) , which are dominant to yellow leaves (gg) . She crosses a double heterozygous (RrGg) with a double recessive (rrgg) , and expect to see a 1:1:1:1 ratio in the offspring. Instead, she sees these results: Genotype RrGg rrgg Rrgg rrGg Predicted outcome 500 500 500 500 Actual outcome 900 900 100 100 Which phenomenon would she hypothesize accounts for the pattern she sees? crossing-over respiration cytokinesis independent assortment
Biology
1 answer:
marin [14]3 years ago
7 0

Answer:

The correct option is <em>B. Crossing- over </em>

Explanation:

In biology, crossing over can be described as a phenomenon by which homologous chromosomes exchange segments during the process of meiosis.

The unexpected results came because the DNA segment between the homologous chromosomes was exchanged during meiosis. The alleles got shuffled by this process and hence showed the unexpected results.

Crossing over and independent assortment are phenomenon which occurs only during the process of meiosis. These phenomenons cannot be observed during mitosis.

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Egg laying in fruit flies can be triggered (induced) when males deposit their sperm in the spermathecae of the females. What is
ElenaW [278]

When males place their sperm in the females' spermathecae, fruit flies can start laying eggs (a process known as induction). Induced egg laying has the selection benefit of ensuring that a male fly's sperm is utilized for fertilization, which is beneficial for male flies.

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  • Because it assures that a male fly's sperm is used for fertilization, induced egg laying for male flies has this benefit.

Thus from the above points, we can conclude that egg laying in the fruit flies had an adantage.

Learn more about induction:

brainly.com/question/9748392

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5 0
2 years ago
Explain how the abiotic factors in an environment have a huge impact on the biotic factors living in an environment.
ipn [44]

Abiotic factors
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Biotic factors
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The development of organims is under the control of abiotic factors. Some are adapted to heat, cold etc ... The abiotic factors will define which organisms are able or not to live in a specified place.

The living organisms will constitute the biotic factors, which define if and how can an organism live in a specified environment.

8 0
4 years ago
Today, society sees slavery as a moral issue. During the antebellum era, how is slaveryviewed by the South?
Elena-2011 [213]
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Darina [25.2K]

Answer:

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Can you curl your tongue? Tongue-curling in humans (T) is a dominant genetic trait. Derek can curl his tongue but his wife, Ashl
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