Study the given data and answer the questions following the data.

Parental plants cross fertilised and seeds collected F₁ (first generation offspring) F₂ (offspring of self pollination of F₁)

Male parent always bore red flowers. 330 seeds sown and observed Out of 44 seeds, 33 seeds gave plants with red flowers and 11 seeds gave plants with white flowers

Female parent always had white flowers. All 330 gave red flowers

(a) What is the term for this type of cross?
(b) What does the data of the column marked F₁ indicate?
(c) Express the genotype of the (i) parents (ii) F₁ progeny, and (iii) F₂ progeny.

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Solution

(a) It is a monohybrid cross.

(b) The data in column F₁ indicates that red coloured flowers are dominant over white coloured flowers.

(c) The genotypes are as follows -
(i) Parents - RR, rr
(ii) F₁ progeny - Rr
(iii) F₂ progeny - RR, Rr, rr

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Similar questions

\begin{matrix} P a r e n t a l p l a n t s c r o s s & F 1 F i r s t G e n e r a t i o n & F 2 O f f s p r i n g s o f s e l f f e r t i l i s e d a n d s e e d s & o f f s p r i n g s & p o l l i n a t i o n o f F 1 c o l l e c t e d M a l e p a r e n t s a l w a y s & 330 s e e d s s o w n a n d & O u t o f 44 s e e d s 33 s e e d s b a r e r e d f l o w e r s s . & o b s e r v e d . & g a v e p l a n t s w i t h r e d F e m a l e p a r e n t a l w a y s & A l l 330 g a v e r e d & f l o w e r s a n d 11 s e e d s h a d w h i t e f l o w e r s . & f l o w e r s . & g a v e p l a n t s w i t h w h i t e f l o w e r s . \end{matrix}

F_{1}

	List I		List II
A	Mendel performed .................. between plants having alternate traits of a character, e.g., tall and dwarf, coloured flower and white flower.	1	Second filial
B	For this he removed .................. (emasculation) from 50% of the flowers of each type and used them as female parents.	2	Reciprocal crosses
C	.................. from the other flower were collected and dusted over the stigma of these flowers. The pollinated flowers were covered with paper bags and allowed to form pods with seeds.	3	Monohybrid cross
D	The cross involving two traits of a single character is called .....................	4	First filial generation
E	Cross involving traits of two characters is known as ..................	5	Anthers
F	The seeds of the cross were collected and sown next year. The plants were hybrid in nature. They constituted the ................ or $F_{1}$ generation.	6	Pollen
G	Self Breeding for $F_{2}$ and $F_{3}$ generations. Plants of $F_{1}$ generation were allowed to perform ................... or self-fertilization.	7	Third filial generation
H	Mendel collected seeds of the new generations. Plants raised from them were called ...................	8	Dihybrid cross
I	or $F_{2}$ ..............	9	Self-pollination
J	Further self-pollination of $F_{2}$ plants produced $F_{3}$	10	Generation

F_{1}

F_{2}

F_{1}

F_{2}

Which of the following may be used to obtain an $F_{2}$ generation ?

(a) allowing flowers on a parent plant to be self -pollinated

(b) allowing flowers on an $F_{1}$ plant to be self -pollinated

(d) cross-pollinating two parent plants

F_{1}

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Parental plants cross fertilised and seeds collected	F₁ (first generation offspring)	F₂ (offspring of self pollination of F₁)
Male parent always bore red flowers.	330 seeds sown and observed	Out of 44 seeds, 33 seeds gave plants with red flowers and 11 seeds gave plants with white flowers
Female parent always had white flowers.	All 330 gave red flowers