genetics Mendel's laws

Mark the right answers.

The trait eye colour has two alleles. Allele "A" determines dark colour and allele "a" determines light colour. A person Aa...

• Will have dark eyes

• Will have light eyes

• is known as homozygotic

• is known as heterozygotic

Which of the following characters were analysed by Gregori Mendel in his studies?

• seed colour

• seed shape

• flower colour

• stem length

Tags

NGSS.MS-LS1-5

NGSS.MS-LS4-4

Mark the right answers about Mendel's laws exceptions.

• In intermediate inheritance there are two possible phenotypes

• A good example for multiple alleles is the trait blood type in humans

• In a codominance case both phenotypes appear at the same time.

• In the codominance case the ratio for F2 varies from 3:1 to 1:2:1

Which model species did Mendel use for his studies about the inheritance of characters?

• Human beings

• Apple trees

• Chickens

• Pea plants

What is the name for the most frequent phenotype?

• Frequent

• Recessive

• Dominant

• Strong

Tags

NGSS.HS-LS4-3

NGSS.HS-LS4-4

If we cross two heterozygous plants (RrAa) for two characters (R red flower, r blue flower, A long stem, a short stem) how many phenotypes will I observe in the offspring?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-LS3-3

If we cross two heterozygous plants (RrAa) for two characters (R red flower, r blue flower, A long stem, a short stem) What will be the proportion of phenotypes in the offspring?

• 9:3:3:1

• There will be only one phenotype. 100%

• 3:1

• 1:2:1

Tags

NGSS.HS-LS3-1

Mendel crossed purebred yellow seeds with purebred greenseeds. Then he self ferilised the F1 progeny to obtain the F2. The statistic analysis of the F2 showed that... (more than one answer might be right)

• 100% of the F1 and 75% of the F2 were yellow.

• All seed were yellow.

• 50% of F1 and 75% of F2 were yellow.

• Green colour disappeared in the F1 but reappeared in F2

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

¿How do we call the less frequent phenotypes?

• Recessive

• Weak

• Dominant

• Less frequent

Tags

NGSS.HS-LS4-4

Each gene has two alleles. If we consider and heterozygous organism for a certain trait, the phenotype will correspond to...

• Dominant allele

• Recessive allele