Question

During his studies on genes in Drosophila that were sex-linked. T.H. Morgan found population phenotypic ratios deviated from expected 9 : 3 : 3 : 1. Explain
the conclusion he arrived at.​

Answer 1

Explanation:

$\huge\bold\red{Answer}$

(ɪ) ʜᴇ ᴏʙsᴇʀᴠᴇᴅ ᴛʜᴀᴛ ᴡʜᴇɴ ᴛʜᴇ ᴛᴡᴏ ɢᴇɴᴇs ɪɴ ᴀ ᴅɪʜʏʙʀɪᴅ ᴄʀᴏss ᴀʀᴇ ʟᴏᴄᴀᴛᴇᴅ ᴏɴ ᴛʜᴇ sᴀᴍᴇ ᴄʜʀᴏᴍᴏsᴏᴍᴇ, ᴛʜᴇ ᴘʀᴏᴘᴏʀᴛɪᴏɴ ᴏғ ᴘᴀʀᴇɴᴛᴀʟ ɢᴇɴᴇ ᴄᴏᴍʙɪɴᴀᴛɪᴏɴs ɪɴ ᴛʜᴇ ᴘʀᴏɢᴇɴʏ ᴡᴀs ᴍᴜᴄʜ ʜɪɢʜᴇʀ ᴛʜᴀɴ ᴛʜᴇ ɴᴏɴ-ᴘᴀʀᴇɴᴛᴀʟ ᴏʀ ʀᴇᴄᴏᴍʙɪɴᴀᴛɪᴏɴ ᴏғ ɢᴇɴᴇs.

(ɪɪ) ᴍᴏʀɢᴀɴ ᴀɴᴅ ʜɪs ɢʀᴏᴜᴘ ғᴏᴜɴᴅ ᴛʜᴀᴛ ᴡʜᴇɴ ɢᴇɴᴇs ᴡᴇʀᴇ ɢʀᴏᴜᴘᴇᴅ ᴏɴ ᴛʜᴇ sᴀᴍᴇ ᴄʜʀᴏᴍᴏsᴏᴍᴇ, sᴏᴍᴇ ɢᴇɴᴇs ᴀʀᴇ ᴛɪɢʜᴛʟʏ ʟɪɴᴋᴇᴅ ᴀɴᴅ sʜᴏᴡ ʟᴇss ʀᴇᴄᴏᴍʙɪɴᴀᴛɪᴏɴ.

(ɪɪɪ) ᴡʜᴇɴ ᴛʜᴇ ɢᴇɴᴇs ᴀʀᴇ ʟᴏᴏsᴇʟʏ ʟɪɴᴋᴇᴅ ᴛʜᴇʏ sʜᴏᴡ ʜɪɢʜᴇʀ ʀᴇᴄᴏᴍʙɪɴᴀᴛɪᴏɴ.

Answer 2

Explanation:

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