A种植物细胞（基因型为Aa），B种植物细胞（基因型为Bb）；去掉细胞壁后，诱导两种体细胞的原生质体融合，形成单核的杂种细胞。若经过组织培养得到的杂种植株是（  ）

如果④的基因组成未知，那么他单眼皮的可能性是____．

阅读理解

    Shakespeare's Birthplace and Exhibition of Shakespeare's World. Welcome to the world-famous house where William Shakespeare was born in 1564 and where he grew up. The property(房产) remained in the ownership of Shakespeare's family until 1806. The House has welcomed visitors travelling from all over the world，for over 250 years.

◆Enter through the Visitors' Centre and see the highly-praised exhibition Shakespeare's World, a lively and full introduction to the life and work of Shakespeare.

◆Stand in the rooms where Shakespeare grew up.

◆Discover examples of furniture and needlework from Shakespeare's period.

◆Enjoy the traditional(传统的) English garden, planted with trees and flowers mentioned in the poet's works.

    The Birthplace is within easy walking distance of all the car parks shown on the map；nearest is Windsor Street(3 minutes' walk)．

The House may present difficulties but the Visitors' Centre, its exhibition, and the garden are accessible(可进入的) to wheelchair users.

    The Shakespeare Coffee House(opposite the Birthplace).