genetics-monohybrid cross

In watermelons, green rinds (G) are dominant to striped rinds (g).  What is the genotype of a heterozygous green watermelon?

• GG
• Gg
• gg
• green

In cacti, long arms (A) are dominant to short arms (a).  Suppose 2 heterozygous cacti are crossed.  What percentage of their offspring are expected to have short arms?

• 0%
• 25%
• 75%
• 100%

A __________ allele always shows up in an organism when the it is present.

• dominant
• hybrid

An allele (T) for tongue-rolling is dominant over non-tongue rolling. What would be the genotypes of both parents if all of the offspring in the F1 generation are non-tongue rolling?

• TT X Tt

• Tt X tt

• tt X tt

• TT X tt

In garden pea plant, long stem is dominant over short stem. How many percent will be short stem garden pea plants that may appear in the first filial generation if both parents are heterozygous for the given trait?

• 25% short stem pea plant

• 50% short stem pea plant

• 75% short stem pea plant

• 100% short stem pea plant

Who is the father of genetics? 

• Charles Darwin 
• Gregor Mendel
• Dimitri Mendeleev 
• Hans Krebs 

An organism with two different alleles for a trait is said to be: 

• recessive
• hybrid
• dominant
• purebred

Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?

• 100% Pp (purple)
• 50% Pp (purple); 50% pp (white)
• 75% Pp (purple); 25% pp (white)
• 25% PP, 50% Pp, 25% pp
  75% purple, 25% white

What is another way of saying "purebred"?

• homozygous
• dominant
• recessive
• heterozygous

An organism's genetic make-up:

• phenotype
• genotype
• dominant
• recessive