题干

某种牛的群体中,基因型AA的个体体色是红褐色,aa是红色;基因型Aa的雄性是红褐色,雌性却是红色。下表是该种牛的三个杂交组合及其后代的表现型比值,请回答下列问题:

亲本杂交组合

子代表现型及比值

红褐色公牛

红褐色母牛

红色公牛

红色母牛

组合一(均为纯合子)

1

0

0

1

组合二

1

0

1

2

组合三

3

1

1

3

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    Guided Walking Week April 2016

    Dates: April 30th-May 7th 2016

    Location: Abdet, Costa Blanca

    A week of guided walking in the mountains around Abdet. Highlights include the climbing of Valencia's highest summit (Sierra de Aitana), traveling completely around the impressive Puig Campana, and several explorations in the Sierra de Aitana. Ancient trails lead through spectacular canyons(峡谷) to abandoned settlements situated high in the mountains. You will discover the snow trader routes which lead from the incredible snow holes high in the mountains down to the villages and towns on the coast. These years, golden eagles have made a return to this area, and you may also see other animals—wild goats, foxes, wild pigs and red squirrels.

    As part of the week you are invited to help clear some local walking paths. This involves clearing collapsed (坍塌的) walls and rocks, cutting back fallen trees. This is of course optional and is just for half a day, it's actually great fun!

Price:$499

Includes:

    Accommodation in the beautiful mountain village of Abdet

    All food-good home cooking

    Beer, wine, soft drinks

    Snacks and post walk treats

    Packed lunches & drinks(except café/bar visits)

    Expert guiding

    Photos/Videos of your days in the mountains

    Airport pick-up/return $25 each way(fly to Alicante)

    Single room supplement $75

    To book or get further information, please contact info@abdet.com.