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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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Specialized enzymes called _____ polymerases can bypass distortions in the DNA template but tend to introduce replication errors
Yuri [45]

Answer:

The correct answer is: translesion.

Explanation:

Also called DNA polymerase V, the translesion polymerase is responsible for the repair of the DNA in prokaryotes like Escherichia coli.

These special enzymes repair DNA lesion during DNA replication. If the enzyme fails, the damage in the DNA can lead to the death of the cell.

Replication in prokaryotes is much more prone to errors than replication in eukaryotes, one of the reasons being this polymerase not being as effective as the polymerase in charge of repairing eukaryotic DNA, the DNA polymerase beta.

5 0
3 years ago
Male cones grow near the of the plant while female cones are located near the
Rom4ik [11]

Male cones grow near the<u> lower region</u> of the plant, while female cones are located near the<u> top of the tree.</u>

Sexual Reproduction in Gymnosperms :

The lifecycle of a gymnosperm is also characterized by the alternation of generations, just as the lifecycle of an angiosperm. In conifers, such as pines, the sporophyte is the part of the plant that is green and leafy, and the gametophytes, in both male and female, are found in the cones. Female cones are distinguishable from male cones by their bigger size and their location closer to the crown of the tree. Male cones, on the other hand, are significantly smaller and can be found closer to the base of the tree. Because the pollen is dispersed and carried by the wind, it is impossible for a gymnosperm to self-pollinate due to the configuration of the plant.

Learn more about male and female cones here :

brainly.com/question/6202925

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6 0
1 year ago
Are the chemicals reactions in equilibrium within living cells
vesna_86 [32]
No because a chemical reaction that is at equilibrium in living cells is not capable of doing any work
8 0
3 years ago
Please help me with this question..asap​
fiasKO [112]

Answer:

The pollen grain is creating a tube down the style of the flower. <u>It is necessary as that is how the pollen is able to travel down the style into the ovary where the baby seed is located. This is how the seed is fertilized, and is ready for reproduction.</u>

7 0
2 years ago
PLZZZZZZ HELP ME how plants help provide oxygen for animals
VLD [36.1K]
Because people and animals exhale carbon dioxide which plants need and they release oxygen
3 0
3 years ago
Read 2 more answers
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