MONOHYBRID CROSS
Introduce the concepts of Mendelian monohybrid cross.
Question 1
How many characteristics are being analyzed in a monohybrid cross?
1
2
3
4
Question 2
Mendel formed the Mendel's First Law, the Law of _____________.
Question 3
Which of the following best explains Mendel’s Law of Segregation?
The alleles for a gene are kept at separate positions on a chromosome.
A gamete of an organism will carry only one allele for each gene.
When gametes combine in fertilization, the alleles for each gene will come from one parent only.
A gamete of an organism will carry only two alleles for each gene.
Question 4
Gregor Mendel investigated the inheritance of genes through breeding experiments using his pea plants. How did he choose the plants as the parental generation (P)?
[You may choose more than one answer.]
Both parents are pure breeding.
The parental plants show contrasting trait to each other.
The genotype of parental plants are AA x Aa
The genotype of parental plants are AA x aa
Question 5
The Punnett square provided the all possible genotypes of the F1 generation produced by the GG x gg cross. What is the phenotypic ratio of the F1 generation (dominant to recessive)?
0 : 4
4 : 0
2 : 2
3 : 1
Question 6
The Punnett square provided the all possible genotypes of the F1 generation produced by the GG x gg cross. What is the genotype of the F1 generation?
Question 7
When Mendel produced the F1 generation from the pure-bred parental plants, what type of cross was conducted to produce F2 generation to obtain phenotypic ratio 3:1?
Back cross
Monohybrid cross
Self cross
Test cross
Question 8
If the genotype of parent is GG, what type of gamete is formed?
100% gametes carry dominant allele (G).
100% gametes carry recessive allele (g).
50% gametes carry dominant allele (G).
50% gametes carry recessive allele (g).
Question 9
If the homozygous dominant plant cross with the homozygous recessive plant, what is the genotype of the F1 generation?
100% homozygous dominant.
100% heterozygous.
100% homozygous recessive.
50% homozygous dominant, 50% homozygous recessive.
Question 10
The heterozygous F1 generation is self-crossed, which one is the correct Punnett's square to show this cross?
Question 11
State the phenotypic ratio (dominant to recessive) for the Punnett square provided.
3 : 1
1 : 3
2 : 2
4 : 0
Question 12
The genotypic ratio for the Punnett square provided is 1 [[1]] : 2 [[2]] : 1 [[3]]
GG
Gg
gg
Question 13
To identify the genotype of yellow-seeded pea plants as either homozygous dominant (YY) or heterozygous (Yy), you could do a test cross with plants of genotype _______.
YY
Yy
yy
yY
Question 14
Assume tall (T) is dominant to dwarf (t). What is the genotype of the male parent?
Question 15
There are many chromosomes within one gene.