Class 10th science notes
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The functional segments of DNA that carry the information for protein synthesis are called:
Anonymous Quiz
38%
Chromosomes
16%
Ribosomes
38%
Genes
8%
Alleles
If the F1 generation from a cross shows a trait that was not present in either parent, it is an example of:
Anonymous Quiz
19%
Dominance
35%
Recessiveness
23%
Independent assortment
24%
This scenario is not possible with simple Mendelian genetics.
If a round, green-seeded pea plant (RRyy) is crossed with a wrinkled, yellow-seeded pea plant (rrYY), what will be the phenotype of the F1 generation?
Anonymous Quiz
53%
Round and yellow
23%
Round and green
22%
Wrinkled and yellow
3%
Wrinkled and green
Who is known as the 'Father of Genetics' for his extensive work on inheritance using pea plants?
Anonymous Quiz
11%
Charles Darwin
76%
Gregor Mendel
10%
James Watson
2%
Louis Pasteur
Which of the following represents the genotype of a heterozygous tall pea plant?
Anonymous Quiz
43%
TT
48%
Tt
6%
tt
4%
tT
How many pairs of chromosomes are present in a human somatic (body) cell?
Anonymous Quiz
11%
22
70%
23
6%
44
13%
46
A normal human female has which of the following sex chromosome combinations?
Anonymous Quiz
76%
XX
19%
XY
4%
XO
1%
YY
The alternative forms of a gene occupying the same position on homologous chromosomes are called:
Anonymous Quiz
30%
Genotypes
28%
Phenotypes
40%
Alleles
2%
Loci
A cross between a plant with round yellow seeds (RRYY) and a plant with wrinkled green seeds (rryy) produces F1 plants with round yellow seeds. What is the genotype of the F1 plants?
Anonymous Quiz
30%
RRYY
61%
RrYy
4%
rryy
5%
Rryy
The observable physical or biochemical characteristics of an organism is its:
Anonymous Quiz
23%
Genotype
52%
Phenotype
15%
Allele
10%
Genome
What is the phenotypic ratio expected in the F2 generation of a dihybrid cross?
Anonymous Quiz
11%
1:2:1
25%
3:1
59%
9:3:3:1
6%
1:1
What is the genotypic ratio obtained in the F2 generation of a monohybrid cross?
Anonymous Quiz
27%
3:1
16%
1:1:1:1
25%
9:3:3:1
31%
1:2:1
A recessive trait is expressed only when the organism is:
Anonymous Quiz
25%
Heterozygous
27%
Homozygous dominant
40%
Homozygous recessive
8%
A hybrid
2
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