Yanlış cevap vereceğine joker hakkını kullan.

Here, vereceğine means instead of giving or rather than giving.

The full pattern is:

X-eceğine / -acağına, Y = instead of doing X, do Y = rather than doing X, do Y

So:

Yanlış cevap vereceğine joker hakkını kullan. = Instead of giving a wrong answer, use your joker/lifeline.

Even though verecek looks like future tense, in this structure it does not simply mean you will give. It is part of a fixed pattern that expresses preference between two actions.

That is a very common question. In Turkish, the form -eceğine / -acağına can be used in a construction meaning instead of doing... or rather than doing...

So although verecek by itself can mean will give, in this sentence:

yanlış cevap vereceğine does not literally mean because you will give a wrong answer.

It means something more like:

• rather than give a wrong answer
• instead of giving a wrong answer

This is one of those places where a tense-looking form has a special grammatical use.

It comes from the verb vermek = to give.

Step by step:

• verb stem: ver-
• future marker: -ecek → verecek
• possessive-type ending: -i / -ı / -u / -ü
• dative: -ne / -na

So you get:

ver-eceğ-i-ne → vereceğine

You do not need to memorize every internal step perfectly at first. The most useful thing is to recognize the whole pattern:

verb + eceğine / acağına
= instead of doing that verb

Example:

• Bekleyeceğine gel. = Instead of waiting, come.
• Şikâyet edeceğine çözüm bul. = Instead of complaining, find a solution.

Yanlış means wrong / incorrect, and cevap means answer.

So:

• yanlış cevap = wrong answer

In this sentence, yanlış is an adjective modifying cevap.

Then the verb phrase is:

yanlış cevap vermek = to give a wrong answer

This is natural Turkish, because Turkish uses cevap vermek literally to give an answer, just like English can.

Joker in Turkish usually means a wild card, bonus option, or in quiz/game contexts, a lifeline.

In this sentence, it most likely refers to a quiz-show type lifeline:

• ask for help
• eliminate options
• phone a friend
• etc.

So joker hakkı is your right to use a lifeline or joker option.

This is because of both possession and the accusative case.

The base noun is:

• hak = right

But when Turkish adds certain endings, hak becomes hakk-.

So:

• hakkı = his/her/its right or the right in some contexts
• hakkını = his/her/its right
  • accusative, so his/her/its right as the direct object

In joker hakkını kullan:

• joker hakkı = the joker right / lifeline right
• joker hakkını = the joker right as the thing being used

And kullanmak takes a direct object, so the accusative is needed here:

• kitabı kullan = use the book
• fırsatını kullan = use your opportunity
• joker hakkını kullan = use your lifeline

In Turkish, many noun phrases like this are built as a type of possessed construction.

joker hakkı literally works like:

• the right of joker
• more naturally: joker right / lifeline right

This is a standard Turkish noun construction. The first noun modifies the second, and the second usually takes a possessive ending:

• telefon numarası = phone number
• okul kapısı = school door
• joker hakkı = joker right / lifeline right

Then, because it is the object of kullan, it becomes:

• joker hakkını

So the ending is not really saying his or her in an English sense here. It is just part of how this Turkish noun phrase is formed.

In Turkish, subject pronouns are often omitted because the verb form already shows the person.

kullan is the singular informal imperative:

• Use.

So the sentence is speaking to one person informally:

• Yanlış cevap vereceğine joker hakkını kullan.
• Instead of giving a wrong answer, use your lifeline.

You could add sen, but it would usually sound unnecessary unless you want emphasis:

• Sen joker hakkını kullan.

Most of the time, Turkish leaves sen out.

Kullan is the singular informal imperative.

It is used:

• with a friend
• with someone younger
• in casual speech
• in direct instructions

If you want a more polite or plural form, you would say:

• kullanın

So:

• Yanlış cevap vereceğine joker hakkını kullan. = informal singular
• Yanlış cevap vereceğinize joker hakkınızı kullanın. = polite/plural

That second version addresses:

• you plural, or
• you formal/polite singular

Yes. A very natural alternative is:

Yanlış cevap vermek yerine joker hakkını kullan.

This also means:

• Instead of giving a wrong answer, use your lifeline.

So you have two useful patterns:

• verb-eceğine / acağına
• verb-mek yerine

Both can mean instead of doing...

In this sentence, both are natural. The -eceğine version can feel a little more idiomatic or punchy in spoken Turkish.

Turkish often places the action being contrasted first, and the main command at the end.

So:

Yanlış cevap vereceğine
first sets up the unwanted option:

• instead of giving a wrong answer

Then:

joker hakkını kullan gives the preferred action:

• use your lifeline

This order is very natural in Turkish:

• unwanted/less preferred action
• preferred action/command

Also, Turkish usually puts the main verb at the end of the clause, so kullan naturally comes last.

Here it is an adjective.

It modifies cevap:

• yanlış cevap = wrong answer

If it were modifying a verb directly, it could function more like an adverb:

• Yanlış anladım. = I understood incorrectly.

But in your sentence, it is clearly describing the noun cevap.

Yes. The exact shape changes because of vowel harmony and consonant changes.

You may see:

• yapacağına
• gideceğine
• bekleyeceğine
• okuyacağına

They all belong to the same pattern.

Examples:

• Konuşacağına dinle. = Instead of talking, listen.
• Ağlayacağına çalış. = Instead of crying, work.
• Bekleyeceğine başla. = Instead of waiting, start.

So do not memorize only -eceğine as one frozen ending. Learn the pattern as:

verb + (y)acağına / (y)eceğine

Yes, it sounds natural, especially in a quiz, game, or test-like context.

It has a practical, spoken feel:

• Don’t risk a wrong answer; use your lifeline instead.

A native speaker might say this when someone has an available help option and should use it before answering incorrectly.

Very close natural English equivalents would be:

• Instead of giving a wrong answer, use your lifeline.
• Rather than answering incorrectly, use your joker.
• Use your lifeline instead of giving a wrong answer.

Here are the main dictionary forms:

• yanlış = wrong, incorrect
• cevap = answer
• vermek = to give
• joker = joker, lifeline, wildcard
• hak = right
• kullanmak = to use

Useful chunks to remember:

• cevap vermek = to answer, to give an answer
• joker hakkı = lifeline right
• hakkını kullanmak = to use one’s right / make use of one’s right

Learning these chunks will help more than translating word by word every time.