SC.7.L.16.2 Punnett squares and Pedigrees

The genotypes of one parent and its offspring are shown in the Punnett square. The genotype of the other parent is missing.

 

What is the most likely genotype of the other parent based on the offspring genotypes shown in the table?

• The genotype is recessive for both alleles.

• The genotype is dominant for both alleles.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

People with freckles have a dominant trait. Having no freckles is a recessive trait. If two parents are heterozygous (Ff) for freckles, what is the likelihood that their children will have freckles?

• 75%

• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Gregor Mendel is considered the father of modern genetics. He did experiments with pea plants, including many kinds of crosses to find out what the offspring would look like. When he did a cross between a parent with purple flowers and a parent with white flowers, all offspring had purple flowers. He then crossed two of these offspring. Based on what you know about heredity, what do you predict were the results of Mendel's second cross?

• Half of the offspring had purple flowers, and the other half had white flowers.

• Most offspring had purple flowers, but some had white flowers.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A farmer decides to cross a heterozygous tall pea plant (Tt) with a homozygous tall pea plant (TT).  What percent of the offspring will be tall?

• 100%

• 50%

Tags

NGSS.HS-LS3-1

Individuals with the recessive trait of night blindness (nn) have difficulty seeing in low light. The pedigree shows the inheritance of night blindness in a family.

Which of these are possible genotypes of the first generation?

• NN, Nn

• Nn, Nn

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2