punnet squares, inheritance, sex determination and sex linked traits

Question 1

Why are Punnett squares helpful in predicting traits?

Answer 1

Punnett squares help predict the possible genotypes and phenotypes of offspring by showing how alleles from each parent combine. They also help estimate the probability of inheriting certain traits.

Question 2

Can two parents with a dominant phenotype have a child with a recessive trait? Why or why not?

Answer 2

Yes, if both parents are carriers (have a dominant phenotype but heterozygous genotype, Aa), they can pass on the recessive allele to their child. There’s a 25% chance the child will inherit aa and show the recessive trait.

Question 3

what is a gamete

Answer 3

A gamete is a reproductive cell (sperm or egg) that carries half the genetic material (one set of chromosomes) needed to form a new organism.

Question 4

whats the difference between haploid cell and gamete cell

Answer 4

Haploid cell: Any cell with one set of chromosomes (half the usual number).

Gamete: A special kind of haploid cell used in reproduction — specifically, sperm or egg.

Question 5

think of haploid and diploid cells like

Answer 5

Haploid = 1 set of chromosomes = sperm or egg = gamete

Question 6

in females each egg cell (gamete) receives one what

Answer 6

x chromosome

Question 7

In males what percent of sperm (gamete) receive an X chromosome

Answer 7

50%

Question 8

in males what percent of sperm (gamete) receive an x chromosome

Answer 8

50%

Question 9

there is always a what % chance of determining the sex of a child

Answer 9

50 50 chance

Question 10

sex linked traits R NOT

Answer 10

homologous

Question 11

sex linked traits are found in the blank pair of what

Answer 11

23rd, chromosomes

Question 12

men can or can’t be carriers of x linked traits without being colorblind

Answer 12

Men can’t be carriers of X-linked traits like colorblindness without showing it — because they only have one X chromosome.