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max2010maxim [7]
3 years ago
12

For a particular plant, red flowers (A) are dominant over yellow flowers (a). An initial cross was made between a plant that was

true-breeding for red flowers and another plant true-breeding for yellow flowers. F1 progeny, all having red flowers, were allowed to self- pollinate and form seeds, which were then planted to generate F2 progeny. Pollen from all the resulting F2 plants was pooled and used to fertilize true-breeding yellow plants. What proportion of the progeny resulting from this cross would be expected to have yellow flowers
Biology
1 answer:
Ludmilka [50]3 years ago
4 0

Answer:

The correct answer would be - 1 out of 4 or 25% offspring would be expected to have yellow flowers

Explanation:

Red flowers are dominant over the yellow flower, initially, a cross was made between true-breeding red and true-breeding of yellow flowers

Red flower plant gametes, a  and a and red plants gamete would be  A and A.

so,

       A          A

a     Aa         Aa

a      Aa        Aa

in this cross, all the offspring are red as they have a heterozygous genotype. Now self-pollinating these F1 generation offsprings, gametes would be A and a for both parents:

       A        a

A     AA     Aa

a      Aa     aa

in the f2 generation, there is only 25% of offsprings are yellow flowers.

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PLS HELP!!! What best describes the relationship between
rusak2 [61]

Answer:

Interspecific competition

Explanation:

Interspecific competition occurs when two different species occupy the same environment as they coexist and depend on the same limited resources for survival. As a result of these limited resources, there's competition between the different species with each species having their different levels of fitness. Their level of fitness determines how well they will complete with other species. This will also determine if they will go extinct or thrive in such environment where there's interspecific competition.

The graph given shows the growth of the relative population size of two different species grown together.

It shows that P. aurelia, with time, outcompetes P. coudatum.

This graph clearly suggest that interspecific competition has occurred. Both species are competing for the same limited resources.

P. aurelia has a greater fitness which enables it to outcompete the other species sharing the same environment with it.

Interspecific competition beats describes the relationship between the two species in graph B.

5 0
4 years ago
Specific ways that humans have caused some species to go extinct
ira [324]

Answer:

Destruction of animals' habitats. Some examples of this are... tree logging, slash and burn farming, and deforestation. Humans also hunt animals to extinction either for sport or food.

Explanation:

8 0
4 years ago
Each autumn, the forest floor is covered by leaves that have fallen from trees. Which of the following type of organism is MOST
kozerog [31]
B. Bacteria
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5 0
3 years ago
Read 2 more answers
11. The term used to describe where organisms live with their physical environment is ...
olganol [36]

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Ecosystem fits the bill.

5 0
3 years ago
Generally, it is not possible to determine whether nondisjunction failed to occur in oogenesis or spermatogenesis. However, it i
Maslowich

Answer:

XYY, spermatogenesis.

Explanation:

Non disjunction may be defined as the phenomena in which the sister chromatids are unable to separate during the cell division. Non disjunction can occur in both meiosis and mitosis.

The determination of non disjunction is not possible. But the XYY condition in an individual might occur when the homologous chromosomes of Y are unable to separate during the process of spermatogenesis as Y chromosome is present in males only.  

Thus, the correct answer is XYY and  spermatogenesis

7 0
3 years ago
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