Genetics

How many alleles do you inherit from EACH parent for a specific trait?

• 1

• 2

The physical expression of a trait is called the ...

• genotype

• phenotype

Genotype: TT

• homozygous dominant

• homozygous recessive

• heterozygous dominant

Genotype: Aa

• homozygous dominant

• homozygous recessive

• heterozygous dominant

Cross 2 heterozygous tall pea plants. Tall (T) is dominant to short (t). What fraction of the offspring do you predict will be tall?

• 1/4

• 2/4

• 3/4

• 4/4

Which of the following is a PHENOTYPE for flower color in pea plants?

• Pp

• PP

• Purple

In pea plants, tall (T) is dominant over short (t). If two heterozygous tall pea plants are mated, what is the the expected genotypic ratio of their offspring?

• 3 tall : 1 short

• 1 TT : 2 Tt : 1 tt

In the problem shown, what must the genotype of the missing parent be?

• BB

• Bb

• bb

The different forms or versions of a gene are called ...

• alleles

• gametes

Mendel's Law of Segregation is shown on the outside of a Punnett Square. According to this law, the genes from each parent _____ when gametes are formed.

• combine as one

• separate

• mutliply