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aev [14]
2 years ago
13

A maternal effect can cause the offspring phenotype ratio to depart from that of classic Mendelian inheritance. In a species of

moth, the dominant allele N codes for brown eyes and recessive allele n codes for red eyes.
If an Nn female with brown eyes mates with an Nn male, what is the eye color phenotypic ratio of their offspring?

Biology
1 answer:
Luda [366]2 years ago
6 0
<h2>Maternal effect</h2>

Explanation:

In maternal effect the phenotype of the progeny is decided by the genotype of the mother

  • The female partner is one step ahead to her male partner
  • The ovum transcribes some of its nuclear genes prior to fertilization and these genes are responsible for the development of embryo that is why these genes are called maternal effect genes
  • This effect is observed in Drosophila

In the given question both male and female have brown eyes with Nn genotype,phenotype of the offspring will be decided by the genotype of mother(Nn) hence despite of having recessive genotype(nn) all the offsprings will show brown eyes

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If the current population size of bison is 3,652 and the maximum growth rate of the population is 0.28, calculate the population
s344n2d4d5 [400]

<u>Given:</u>

Present population of bison = 3652

Maximum growth rate = 0.28

<u>To find:</u>

The population of bison after one year.

<u>Solution:</u>

The future population can be calculated with the help of the following formula,

P_F=P_P\times(1+r)^n

where P_F is the future population, P_P is the present population, r is the growth rate and n is the number of years.

On substituting the given values in the formula we get,

\Rightarrow P_F=3652\times(1+0.28)^1

\Rightarrow P_F=3652\times1.28\rightarrow4674.56\approx4675

Therefore, the population size of bison after one year is 4675. The park does not have to control the population because the growth rate is on an average scale.

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1 year ago
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iVinArrow [24]

The probability is 1/16 that a gamete will receive only paternal chromosomes. In life cycles that alternate between haploid and diploid stages, fertilization doubles the number of chromosomes per cell, The pairing of chromosomes along their lengths , which is essential for crossing over is referred to as synapsis

4 0
1 year ago
What portion of the electromagnetic spectrum is most absorbed by the chlorophyll pigments in the thylakoid membr?
vfiekz [6]
<span>Chlorophyll is essential in photosynthesis, allowing plants to absorb energy from light. Chlorophylls absorb light most strongly in the blue portion of the electromagnetic spectrum as well as the red portion. The absorption spectrum of chlorophyll a alone underestimates the effectiveness of certain wavelengths in driving photosynthesis. This is partly because accessory pigments with different absorption spectra are also photosynthetically important in chloroplasts and broaden the spectrum of colors that can be used for photosynthesis.</span>
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1 year ago
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Yuki888 [10]

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7 0
2 years ago
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Answer:

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