If you cross dominant genotype PV/PV male Drosophila with double recessive female and obtain F 1 hybrid. Now you cross F 1 male with double recessive female. i) What type of linkage is seen? ii) Draw a cross with correct genotype. iii) What is the possible genotype in F 2 generation?

i) Again if you cross F 1 male with double recessive female a complete linkage can be seen and it occurs due to the absence of chiasma or crossing over in between the linked genes present on homologous chromosomes. Crossing over will not present in male drosophila. ii) Correct cross over is shown in the below diagram and In F1 generation it shows only two gametes due to lack of crossing over iii) F 2 hybrid exhibits only parental genotype due to complete linkage and Test cross failed to produce 1:1:1:1 ratio & instead produced 7:1:1:7. PV Pv PV pv PV PPVV PPVv PPVV PpVv Pv PPVv PPvv PPVv Ppvv PV PPVV PPVv PPVV PpVv pv PpVv Ppvv PpVv ppv

E M B I B E

Botany Crash Course (Based on Revised Syllabus-2023)>Genetics>Chapter 3 - Chromosomal Basis of Inheritance>Exercise

Embibe Experts Solutions for Exercise 1: Exercise

Author:Embibe Experts

Embibe Experts Biology-Botany Solutions for Exercise - Embibe Experts Solutions for Exercise 1: Exercise

Attempt the free practice questions from Exercise 1: Exercise with hints and solutions to strengthen your understanding. Botany Crash Course (Based on Revised Syllabus-2023) solutions are prepared by Experienced Embibe Experts.

Questions from Embibe Experts Solutions for Exercise 1: Exercise with Hints & Solutions

HARD

12th Tamil Nadu Board

IMPORTANT

Botany Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Chromosomal Basis of Inheritance>Exercise>Q 23

Write the salient features of Sutton and Boveri concept.

EASY

12th Tamil Nadu Board

IMPORTANT

Botany Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Chromosomal Basis of Inheritance>Exercise>Q 24

Differentiate between the terms: X-linked inheritance and Y- linked inheritance.

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Botany Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Chromosomal Basis of Inheritance>Exercise>Q 25

Explain sex-linked inheritance in Drosophila.

HARD

12th Tamil Nadu Board

IMPORTANT

Botany Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Chromosomal Basis of Inheritance>Exercise>Q 31

Explain the mechanism of crossing over.

HARD

12th Tamil Nadu Board

IMPORTANT

Botany Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Chromosomal Basis of Inheritance>Exercise>Q 32

Write the steps involved in molecular mechanism of DNA recombination with diagram.

HARD

12th Tamil Nadu Board

IMPORTANT

Botany Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Chromosomal Basis of Inheritance>Exercise>Q 33

How is Nicotiana exhibit self- incompatibility. Explain its mechanism.

HARD

12th Tamil Nadu Board

IMPORTANT

Botany Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Chromosomal Basis of Inheritance>Exercise>Q 34

What is gene mapping? Write its uses.

HARD

12th Tamil Nadu Board

IMPORTANT

Botany Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Chromosomal Basis of Inheritance>Exercise>Q 35

If you cross dominant genotype PV/PV male Drosophila with double recessive female and obtain F₁hybrid. Now you cross F₁male with double recessive female.

i) What type of linkage is seen?

ii) Draw a cross with correct genotype.

iii) What is the possible genotype in F₂generation?