Laboratory Report 34
a. Traits passed from parents to progeny ______________________________________________
b. Part of DNA coding for a specific protein ______________________________________________
c. Contain homol
...
Laboratory Report 34
a. Traits passed from parents to progeny ______________________________________________
b. Part of DNA coding for a specific protein ______________________________________________
c. Contain homologous genes ______________________________________________
d. Alternate forms of a gene ______________________________________________
e. Alleles of a gene pair are identical ______________________________________________
f. Alleles of a gene pair are different ______________________________________________
g. Observable form of a trait ______________________________________________
h. Genetic composition determining a trait ______________________________________________
i. Allele expressed in heterozygote ______________________________________________
j. Allele not expressed in heterozygote ______________________________________________
homozygous tall _________________________________________________________________________
heterozygous tall ________________________________________________________________________
dwarf __________________________________________________________________________________
homozygous tall ____________ heterozygous tall ____________ dwarf ____________
2. MONOHYBRID CROSSES WITH DOMINANCE
a. In corn plants, plant height is controlled by one gene with two alleles. How many alleles that control the trait for
height are present in each cell nucleus of a corn plant? _______________________________________________
How many alleles that control the trait for height are present in the nucleus of each gamete formed by a corn
plant? ______________________________________________________________________________________
b. Indicate the genotypes of these corn plants:
c. Indicate the genotypes of possible gametes of these corn plants:
d. Determine the predicted phenotype ratio in progeny of a cross between two heterozygous tall corn plants.
Parent phenotypes __________________ × ____________________
Parent genotypes __________________ ____________________
Gametes ________ _________ _________ _________
Punnett square ________ ________
e. Examine the corn seedlings in tray 1 that are progeny of a cross of two monohybrid tall corn plants. Record the
number of:
Genotype ratio ____________________________________________________________________
Phenotype ratio ____________________________________________________________________
tall plants _______________ dwarf plants _______________
Inheritable trait.
Coding region.
Homologous chromosomes
Alleles
Homo zygotic
Hetero zygotic
Phenotype.
Genotype
Dominant Allele.
Recessive allele
T T or t t
TT
Tt
tt
Two allele control the hight in all cell of corn plant (deploid).
only one allele for hight in gamate of corn plant (haploid).
Tall Tall
Tt Tt
T t T t
T t
T t
TT Tt
Tt tt
1:2:1
3:1
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