Study the given data and answer the following questions.
PARENTAL PLANTS CROSS FERTILISED & SEED COLLECTED
F1(first generation of offspring)
F2 ( offspring of self pollination of F1)
Male parent always bore red flowers.
Female parent always had white
flowers.
330 seeds sown and observed
All 330 gave red flowers
Out of 44 seeds 33 seeds gave plants with red flowers and 11 seeds gave plants with white flowers
1) What is the term for this type of cross?
2) What does the data of coloumn marked F1 indicate?
3) Express the genotype of a) parents b)F1 progeny and c)F2 progeny.
Answers
The term for this type of cross is a monohybrid cross
Step by step explanation
1) A monohybrid cross is often a hybrid among two individuals with homozygous genotypes resulting in the opposite phenotype for a certain genetic trait. "The combination among two cross monohybrid traits is called the Monohybrid Cross."
Monohybrid cross is important for the inheritance of a single gene. This can be easily shown from Punnett Square.
Monohybrid cross are used by geneticists to analyze how homozygous offspring transmit heterozygous genotypes inherited from their parents.
Eg: for a monohybrid cross is the breeding of the long-stemmed pea plant with a short-stemmed pea plant. The cross between both the pair produces heterozygous offspring.
2) The data of column F1 indicates the genes for red colour is more dominant over white colour.
The given data suggests that red flowers are more dominant over white flowers.
3) The genotype of parents
RR(male plants) that is homozygous red
rr (female plants) that is homozygous white
The genotype in F1 progeny is Rr (hetrozygous red)
The genotype in F2 progency is RR and rr that is homozygous red and white.
From the given data we can suggest that the progeny for F1 is more and dominant character over F2
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