Study the given data and answer the questions following the data- Veginarray - WlineParental plants cross-F1 First Generation-F2 Offsprings of self- fertilised and seeds-offsprings-pollination of F 1 collected-lllhlineMale parents always-330 seeds sown and-Out of 44 - seeds 33 seeds 1 bare red flowerss-observed-gave plants with redll Female parent always-All 330 gave red-flowers and 11 seeds11had white flowers-flowers-gave plants with whitell -flowers- Illhine lend array i- What is the term for this type of cross-ii- What does the data of the column marked F 1 indicate-iii- Express the gene type of the a parents b F1 progeny and c F2 progeny

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Chromosomes

Study the giv...

Question

Study the given data and answer the questions following the data:
$\begin{matrix} P a r e n t a l p l a n t s c r o s s & F 1 F i r s t G e n e r a t i o n & F 2 O f f s p r i n g s o f s e l f f e r t i l i s e d a n d s e e d s & o f f s p r i n g s & p o l l i n a t i o n o f F 1 c o l l e c t e d M a l e p a r e n t s a l w a y s & 330 s e e d s s o w n a n d & O u t o f 44 s e e d s 33 s e e d s b a r e r e d f l o w e r s s . & o b s e r v e d . & g a v e p l a n t s w i t h r e d F e m a l e p a r e n t a l w a y s & A l l 330 g a v e r e d & f l o w e r s a n d 11 s e e d s h a d w h i t e f l o w e r s . & f l o w e r s . & g a v e p l a n t s w i t h w h i t e f l o w e r s . \end{matrix}$
i. What is the term for this type of cross?
ii. What does the data of the column marked $F_{1}$ indicate?
iii. Express the gene type of the (a) parents (b) F1 progeny and (c) F2 progeny

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Solution

i. Monohybrid cross
ii. Red color of flower dominant over white flower
iii. a. Parents - (RR) and (rr)
b. F1 progeny - Rr
c. F2 progeny - RR, Rr and rr

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Q. 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.

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

$\begin{matrix} Parental plants cross & FI First Generation & F2 offsprings fertilized and seeds collected & offsprings & of self pollination of Fl Male parents always bear red flowers. & 330 seeds & Out of 44 seeds 33 seeds are plants with red Female parent always had white flowers, & sown and observed. All 330 are red flowers. & flowers and 11 seeds are plants with white flowers. \end{matrix}$

i. What is the term used for this type of cross?

ii. What does the data of the column marked F1 indicate?

iii. Express the genotype of the (a) parents (b) F1 progeny and (c ) F2 progeny

Q. Match the following and select the correct match.

	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

Q. Given below is a schematic diagram showing Mendel's Experiment on sweet pea plants having axial flowers with round seeds (AARR) and terminal flowers with wrinkled seeds(aarr). Study the same and answer the questions that follow: [5 MARKS]

(a) Give the phenotype of F1 progeny.
(b) Give the phenotypes of F2 progeny produced by the self-pollination of F1 progeny.
(c) Give the phenotypic ratio of F2 progeny.
(d) Name and explain the law induced by Mendel on the basis of the above observation.

Q. A pure tall plant bearing red colour flowers was crossed with a pure dwarf plant with white flowers. [5 MARKS]
(a) What would be the nature of offsprings in the F1 generation?
(b) If the offsprings of the F1 generation are self-pollinated, what would be the ratio of red flowers to white flowers in the F2 generation?
(c) What can you infer from the ratio obtained in (b)? Which law does it illustrate?

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i. Monohybrid cross ii. Red color of flower dominant over white flower iii. a. Parents - (RR) and (rr) b. F1 progeny - Rr c. F2 progeny - RR, Rr and rr

i. Monohybrid cross
ii. Red color of flower dominant over white flower
iii. a. Parents - (RR) and (rr)
b. F1 progeny - Rr
c. F2 progeny - RR, Rr and rr