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algol [13]
2 years ago
10

In a cross between pure-breeding tall plants with pure-breeding short plants, all of the F1 are tall. When these plants are allo

wed to fertilize themselves, the F2 plants occur in a ratio of 3 tall:1 short.
Which of the following is not a valid conclusion from these results? Group of answer choices
a. The allele that produces the tall condition is dominant to the allele that produces the short condition.
b. The difference between tall and short stature in these lines is controlled by a single gene pair.
c. During production of gametes in F1 plants, the tall and short alleles segregate from each other equally into the gametes.
d. The tall and short traits assort independently of each other in this cross.
e. Fertilization occurs randomly between gametes carrying the tall and short alleles.
Biology
1 answer:
Sindrei [870]2 years ago
5 0

Answer:

d. The tall and short traits assort independently of each other in this cross.

Explanation:

In the given example, the alleles for tallness and shortness of the plant belong to the same gene. The dominant allele “T” makes the plants tall while the recessive allele “t” is responsible for short plants. During gamete formation, independent assortment segregates the alleles of two different genes randomly. This process produces some new allele combinations in the progeny. However, the process of independent assortment is not about the segregation of alleles of a single gene from each other.

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C) The allele R' is becoming more common in the population.

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Can anyone tell me the ratio of the genotype and phenotype ???
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<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2><h2>Phenotype:</h2>

It is the physical appearance of the trait, whether the person has smooth chin or cleft chin.

<h2>Genotype:</h2>

A genotype refers to the genetic characteristics of an organism's trait, if it is heterozygous or hom.ozygous, recessive or dominant.

<h2>_____________________________________</h2><h2>Alleles:</h2>

Cleft chin C is dominant over smooth chin c

<h2>Genotypes of Parents:</h2><h3>FATHER:</h3>

Father has smooth chin thus, it is hom.ozygous recessive i.e. cc

<h3>MOTHER:</h3>

Mother has cleft chin, since cleft chin is dominant there are two possibilities of her genotype,

                           Heterozygous Dominant : Cc

                           Hom.zygous Dominant : CC

but if we cross the hom.zygous fominant mother to hom.ozygous recessive father we will get all the offsprings with the same genotype phenotype so it is not possibile, So the mother is HETEROZYGOUS DOMINANT Cc

<h2>_____________________________________</h2><h2><u>Question</u>:</h2><h2>_____________________________________</h2><h2>Genotypes of Parents:</h2>

FATHER: cc (Hom.ozygous Recessive)

MOTHER: Cc (Heterozygous Dominant)

<h2>_____________________________________</h2><h2>Punnet Square:</h2>

Picture attached!

Picture no 1: it is the cross between hom.ozygous recessive father and hom.ozygous dominant mother and all the offsprings are same both phenotypic and genotypic way so IT IS NOT POSSIBILE

Picture no 2: Its cross between hom.ozygous recessive father and heterozygous dominant mother and there are hybrid and pure recessive both type of offsprings present thus IT IS POSSIBLE!

<h2>_____________________________________</h2><h2>Genotype Ratio of the Offspring:</h2>

Hybrid : Pure Recessive

2 : 2 or 1 : 1

<h2>_____________________________________</h2><h2>Phenotype Ratio of the Offspring:</h2>

Cleft Chin : Smooth Chin

2 : 2 or 1 : 1

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />

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