Human gametes normally have ____chromosomes? 92 23 10 46 12 A pea plant has a pu
ID: 161992 • Letter: H
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Human gametes normally have ____chromosomes? 92 23 10 46 12 A pea plant has a purple phenotype. What type of plant would you use to perform a test cross with this plant to determine Its geneotype? F1 generation pea plant True breeding white plant True breeding smooth seed plant True breeding yellow seed plant True breeding purple plant Which of the following is true regarding daughter cells after meiosis I? They do not contain DNA They are haploid They are polyploid They are gametes They are diploidExplanation / Answer
7. Answer is D. 46
Human gametes normally have 46 chromosomes.
Chromosomes in humans are divided into two types autosomes and allosomes.
Autosomes or body chromosomes are 22 pairs and the allosomes or sex chromosomes are 1 pair of chromosome.
8. A Pea plant has a purple phenotype. The type of plant used to perform a test cross with the plant to determine its genotype is in one case F1 generation pea plant and in one case true breeding white plant.
The dominant allele distribution is unknown so in one case F1 generation pea plant and in one case true breeding white plant is taken.
In one case, Dominant homozygous crossed with homozygous recessive alleles and the offspring are all purple colour and in other case ,the heterozygous dominant and the homozygous recessive are crossed and in this half are white and half are purple
Case1 P P case 2 P p
p Pp P p p Pp pp
p Pp P p p Pp pp
9. After meiosis 1, the daughter cells are haploid .
The meiosis 1 is the process in which the replicated DNA undergo two nuclear divisions to produce four haploid gametes.
This process is used in restoring the genetic content of the zygote to that of parents.
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