1. the speed of sound through a gas will increase if the following is also increased: a. the temperature of the gas b. density of the gas c. compressibility of the gas d. index of refraction of the gas. 2. a rainbow is formed because when white light passes through raindrops, the white light is a. absorbed the raindrops b. reflected by the air c. refracted by the raindrops d. unaffected

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.

The diagram shows a chicken embryo and a human embryo