Question

Define and design a test cross​

Answer 1

Answer:

ᴀ ᴛᴇꜱᴛ ᴄʀᴏꜱꜱ ɪꜱ ᴋɴᴏᴡɴ ᴀꜱ ᴀ ᴄʀᴏꜱꜱ ʙᴇᴛᴡᴇᴇɴ ᴀɴ ɪɴᴅɪᴠɪᴅᴜᴀʟ ᴇxᴩʀᴇꜱꜱɪɴɢ ᴀ ᴅᴏᴍɪɴᴀɴᴛ ᴛʀᴀɪᴛ ᴡɪᴛʜ ᴛʜᴇ ᴏɴᴇ ʜᴀᴠɪɴɢ ɪᴛꜱ ʜᴏᴍᴏᴢyɢᴏᴜꜱ ʀᴇᴄᴇꜱꜱɪᴠᴇ ᴛʀᴀɪᴛ ɪɴ ᴏʀᴅᴇʀ ᴛᴏ ᴅᴇᴛᴇʀᴍɪɴᴇ ᴡʜᴇᴛʜᴇʀ ᴛʜᴇ ᴅᴏᴍɪɴᴀɴᴛ ᴛʀᴀɪᴛ ɪꜱ ʜᴏᴍᴏᴢyɢᴏᴜꜱ ᴏʀ ʜᴇᴛᴇʀᴏᴢyɢᴏᴜꜱ.

Answer 2

Answer:

Here's ur Answer Mate:-

A test cross is performed to determine the genotype of a dominant parent if it is a heterozygous- or homozygous-dominant. For the purpose, a dominant parent is crossed with a homozygous recessive parent. A test cross between a heterozygous dominant (carrying one copy of dominant and recessive allele each) and recessive parent obtains dominant and recessive offspring in a 1:1 ratio while that between homozygous dominant and recessive parent gives all dominant progeny.

A cross between two pure breeding tall (TT) and dwarf (tt) varieties gives all tall F 1

progeny. To test genotype of F 1

progeny, it is crossed with pure breeding dwarf plant and obtains tall and dwarf progeny in a 1: 1 ratio suggesting the tested dominant variety is heterozygous.

Hope it helps uh!