Look at the punnett square obtained by the monohybrid cross between two rabbits.  r r r rr rr r rr rr here,  r  represents the allele for black hair and    r  represents the allele for white hair. both rabbits crossed had genotype  rr.    what will be the phenotypic ratio for the observable monohybrid crosses?   a.    1: 1: 1: 1  b.    2: 2  c.    2: 1: 1  d.    3: 1

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime

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.

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes